In my Swedish version of the rules (having trouble with English) it first says that the machinegun failure counters should be removed after each following manoeuvre and later it say that I should remove one counter after each third manoeuvre. Either I can’t shoot during three manoeuvres or I can’t shoot during three turns. Witch is it?

The way I interpreted it and play as is that you remove a counter after every maneuver.

for a machine gun jam, it's remove one counter after each manuver.

For smoke, and fire, it's remove one counter after each set of 3 manuvers. (when you plan the next set of manuvers, remove a token)