Did anyone else's achievements reset after the Mann Co. Update?

[Sharkle_Bunwich]

Recently I noticed I've been getting some achievements I already had before. I looked on my achievements list and noticed a large chunk of my achievements were reset. Has anyone else experienced this or am I the only one?

[NeoDement]

I haven't.

[Dachande]

Neither have I. Atleast I don't think so

[Chilean]

No but recently my HL2 achievements did the same thing