Bundles in stacks in inventory and item duplication

NOTE: this is all done in survival. Different things happen if performed in creative mode. I wondered what would happen if I emptied a bundle with a full inventory. What ends up happening is the contents of the bundle are thrown. That isn't entirely wrong, but I tested it with a bundle of bundles to see what happened. I did and it the bundles were ejected, but when I picked them up they were in a stack of 16 in my inventory. I repeated it a couple of times to confirm the glitch, thought it was cool, but it definitely doesn't seem intentional. Attached is a picture to describe what it is. Noticed how there are 5 stacks of 16 bundles. I have repeated it many times to get this, with 100% success rate. The stacks act like normal stacks, they can be spread out but won't recombine when split. Thank you for your time. 

Thanks to the comment section (pine1needle) for providing a video of what I talked about. In his video, he also showed the attribute of a duplication glitch. I did some more tests with this glitch, finding the ability to stack bundles to higher than 16. If you have many stacks of bundles created from before, I was able to pick up the entire stack, and then left click on other stacks, the bundles add up indefinitely. The slot will leave one bundle behind. I was able to get so many bundles quickly by doing the duplication glitch. If I completed two stackings (32 bundles with 16 in each stack). You could then put the 16 bundles in the stack of bundles, forming 16 bundles each with 16 bundles, forming 256 bundles. The stacks can be picked up by the hand, and the hand can hold more than 64 at a time. When you place the bundles back down, it goes up to 64, with a chance to only place 1 bundle down. I will attach another photo explaining what I mean. I will be able to answer any questions in the comment section. Thank you.