[0.15.5] Achievements not switching from modded to vanilla

[SandSnip3r]

I installed and enabled the Creative mod (my first mod ever) and started a new game. I noticed I was getting achievements. It told me that I was working on a separate set of achievements since my game was modded. Within a few minutes, I quit my game, deleted the mod, and reloaded my previous vanilla game(only ever played with pure vanilla 0.15). I'm still working under the set of achievements for a modded game. My vanilla achievements are not showing.

[Klonan]

I installed and enabled the Creative mod (my first mod ever) and started a new game. I noticed I was getting achievements. It told me that I was working on a separate set of achievements since my game was modded. Within a few minutes, I quit my game, deleted the mod, and reloaded my previous vanilla game(only ever played with pure vanilla 0.15). I'm still working under the set of achievements for a modded game. My vanilla achievements are not showing.

This is how the system is intended to work