On the one hand, your site, your rules and the bundles have been amazingly good.
On the other, it was really annoying that I can go to the page of something I have got in one of the big bundles but not yet downloaded and not be informed in any way that I already have it before I pay more money to have it.. again.
I have done this several times. In at least one case - https://sparsegamedev.itch.io/spring-falls - I don't mind so much: they got nothing and it's a really, really good puzzle game. But that's not always the case.
So yes, I get that you don't want to automatically add a thousand things to my 'purchased' list, but not warning users in any way that they're re-purchasing stuff just looked greedy and I'm glad that's no longer the case.