Ok, so either I'm still very new to this game, or I missed something, because when I used the block removal feature in the ship build mode, I lost extra blocks that would have been in my inventory, had it not been full. Basically, the block removal feature ate my blocks since my inventory was full. I tried it out again with different types of items and it worked the same way.
I am not tech-savvy and I do not know how to do all this Java stuff or coding or whatnot. I'm sorry.