Hi, thanks for the bug report!
1. I think most of the issues stem from the fact that the input box can only store integers so finding a fix for that should solve most problems.
2. That bug is really funny because you can set it to a negative number, then subtract that mourn from a bar which then adds to it. So you can just add 1 billion to the last bar from the beginning. Great bug but definitely something I'm gonna patch lol.
Thanks for playing!