Can't enter giveaways if you're trying them in the free weekend ?

I was trying out the free weekend of castle crashers and Dont starve together, so now I Can't enter their giveaways because it says it exists in my account. I uninstalled both games and synced my account on steamgifts. They're not in my library but it still gives me the "Exists in account" error and not letting me enter. Has anyone else faced this issue ?