I'll update the title for you to something more appropriate.
Sorry this reply took so long.

Declining and closing this ticket due to not being a bug. If you want to discuss the game, please use the communit forums to do so, this tracker is purely for reporting bugs.

The achievements you're referring to require beating one of the AI's on Master difficulty setting, in a 1v1 skirmish match (and only a 1v1 match) on any of the Official maps that shipped with the game (aka not a steam workshop map)

As long as the author is listed as WFTO in the lobby it's an official map.

Sorry you didn't get an achievement, but the criteria is pretty specific and sadly you didn't meet it in your 3v1 match. That being said.. beating 3 master AIs is pretty impressive. As Bohser said, you'll probably have no trouble beating them one on one and earning the achievements now.

Since this isn't actually a bug i'll have to close the ticket and Mark it as "Not a Bug"

It's (probably) an oversight, which I am hoping to get fixed as soon as possible :)

Thanks for the report.

It's a permanent de-synchronization issue then. Might not be a problem with the hosts internet connection, more likely it's the game causing the problem.. but if it's client only, wih the host not experiencing it.. it's gotta be the de-syncronisation causing it and the game being unable to ever catch up.

Yeah, the new map is technically a new file, uploaded as a brand new workshop entry, it just happens to have the same name.

So it is working as intended (and should happen), if you want to delete the old version you should be able to do so without any problems.

I'll mark this ticket as completed, but if you have any more problems with this issue feel free to add another comment or message me via discord. You know where to find me :)