Sweet, thanks for the in-depth reports and stuff
1) cool bug, I had a theory about what caused it and managed to replicate it.
2) the equipping code needs a look at I think, I'm a bit worried there's maybe a way to duplicate items haha. I will try to figure that one out and also stop you from being offered the same item twice.
Lots of good points in the text wall. I think orange upgrades are worse because I overvalued poison damage a bit, it's quite weak in non-boss fights. Replacey sides getting unusable is sorta intended, I think I need to make it clear that you have them equipped after upgrading though; it's very easy to leave them equipped by mistake. Rescue is overpowered but fun, I'm lucky this isn't a competitive game!