Doesn’t add up here either as far as the Resistance Challenges are concerned.
The “Enemy of my enemy” and “A wrench in the works” didn’t kick of for me due to the known bug so that seems to be correct.
Still missing some other missions according to the stats but I have no idea what I have missed. Edit: Did miss some side missions. Total mission count now at 81.
Screenshots because I'm to lazy to type it out
Maybe it’s a similar problem to some Steam achievements not completing.
I have only played the game since the second week of august and those achievements seemed to update just fine until the august update.
It’s as if the counters for specific machine types get “locked” after a patch (and not just reset to zero). But only for the algorithm that determines the achievements and not for the statistics. (And maybe only if the counter is not zero).
For example: before the august update the only specific machine achievement I did not complete was the Tanks. That was on 8. Now it’s on 36 and the Steam achievement has still not unlocked.
Same for the Tunnel Rat one (discover 5 bunkers). Although I’m not sure exactly what counts as a bunker. If only the Warboard bunkers count then it might have simply been reset to zero and may simply not complete retroactively (had 2 or 3 before august update.
I didn’t have a chance to see if one of the challenge counters updates upon killing enough of any specific machine. That might tell something.
Edit: Probably no surprise anymore but the challenge counters are not retro-active so they start counting from the moment the update is installed.