While still a real glitch, I am a really wierd, but random person. Which is why when I saw the trailer for this game, I thought to myself; "I should get this game ASAP!" and I've had a lot of fun with it!
This guide (while mostly silly) will mostly make sense in the way it is presented (as a guide and a story, not some S**tpost (maybe it is :/ idk).
It will Portray what happened to me when this glitch happened (story), and (hopefully) guidance/tips (Guide) on how to avoid/get out of something similar to this (A Glitch).
So don't take what this is too seriously, but seriously enough to avoid these type of glitches

Things to consider when trying to avoid this type of glitch/possible causes of this type of glitch (or others in case you can't find them anywhere else): Console overload (too many commands to handle), Too many parts of the same type (Can cause Console overload; overduplication due to how many of the same objects there are. Most likey what happened to me), Command Overload (Connect/Disconnect part[s] acts up, may cause crashing as soon as you try to connect or disconnect an object from a peg/hole) Unknown Crashes, Floaty Physics (objects are a bit sparatic), Massive FPS Drop, Self-connecting/disconnecting furniture (can happen when idle or when assembling), slight incompatibility (a few or so things may be incompatible with the minimal requirements for the game, but this makes sense for why the glitching happens, and it will happen if even 1 or 2 things aren't compatible (may also be a possible cause for why I might've got this glitch)), and if you guys and girls (not discriminating) can think of any other possible outcomes or reasons for things to happen in ANY game, but this one in particular, put the info down in the comments!

Let me get this out of the way first: Once you see this thing duplicate, do not switch rooms. It will duplicate once you switch to a different room than the one it is in!
I was just being silly, breaking my vase so I could put it on my abnormal (to others)- actually, its a normal shelf. Yet somehow it decided to finally give me the d-d-d-drop the vase achievement.

Anyways, I continued doing this difficult task and of course the shelf fell... why else would this task of putting broken pieces of vase be difficult? I tried to set it back upright, but to no avail. Then I tried different placement options, once again revealing a flaw in the sructure... all of a sudden, being the IKEA builder that I am, I got the brilliant idea to combine irregular looking shelving (what people would call normal) with my normal one so that it would sit better against the wall. That was a mistake. As soon as I got it sitting against the wall, I thought about making the bedroom area look a lot more like my real one (even though with the way it already was, it did look like my real one... a little messy). That's when it happened, the glitch.

The object shown above will mainly glitch when combined with the aformentoned "irregular" shelving... Caution; it is a living organism, and can duplicate itself... SO DO NOT LEAVE THE ROOM, THIS IS HOW IT DOES IT!!! (We cannot stress how important it is to not leave a room that has the Demon Shelf)

It may seem harmless at first when it is first created. However, once you leave the room... it will gain its power to fly, and typically stay perched on the chimney like a bird. The first intentional artistic design and counterweight for objects on the opposite side, is a beak-like structure hanging off a platform. This design is intended to stop the shelf from toppling over a second time in case it ever fell in the first place (but on that side only... WHY NOT DO THIS FOR THE OTHER SIDES?!?!?). It uses this as a way to stay on the chimney.

This shelf came from combining a regular shelf, and this prototype together. However, when it was discarded, it attempted to come back from the UTSW (Under-The-Shelves World), the world under shelves... A portal from the trash. I decided that this glitch was not only worth recording (I have a crappy youtube video with crappy I-pad audio, look it up when I decide to upload it (I have other ones, but different accounts for them that may or may not exist anymore)) but worth chatting about as well. Yet as soon as I started taking screenshots, THE DEMON WAS STOPPED FOR GOOD!!!!! Like a ghost and pictures... So, it's now stuck in the trash forever, never to be seen again. The power of christ compelled it.

If you were able to read at least some of the things described in this guide, or if you were here just for the guide/help... then thank you, and I hope it was able to be helpful. If it wasn't, I am sorry for wasting your time. Here is a representation of could possibly be you when you're angry/upset:

If you read about half of the guide, then this picture is for you (short, sweet, and to the point):

For reading most of the guide (you may have skipped some words, or gotten bored of reading a couple of parts), I give you some gratitude in the form of a picture:

If you read everything, nothing was skipped, heck... you might've even double checked to see what line you were on a few times, but idk that for sure (and all you needed to do is just read the entire guide, so don't worry :). If you did; Thank You For Reading!!! This is an important person to me, and you should check his Youtube channel:
However, if you skipped everything, or don't care about anything I said/say whatsoever (Insert least insulting thing here that is still insulting enough to get you to type something in the comments), then idc wether or not you read this, but at least you were nice enough to be here, so I'm nice enough to give you this picture:
And this picture I'm putting in here again just for the sake of it...