I've had to do that with the zoom too. For some reason it shifts the relevant keys for zooming in and out one key to the right.
I've had to re-key both of those. I've also meant to do the same for the Check 6 key... I'll probably just use the A key or something... whatever the rudder input keys are considering the fact that I never use those (twisty sticky).
I've tried it with a wireless keyboard (I also used a wireless keyboard with XP and had no trouble at all) and a regular keyboard (which I am using now as it has macro keys) so it's definitely not a wireless problem.
I can't say that it's a problem, I give Check 6's via Vox anyway because I like to give a bit more information than just "check 6".... "N1k high 6 dropping fast 'player', break left" or whatever.
The only trouble with that is when you get those knobs with really difficult to read/pronounce names (of which I am one, I suppose.... I've heard quite a few variants of 'Archaius' since I've been playing)

sometimes it's just easier with those guys to hit the ck 6 key.
Anyway, it's not a big deal, I've got all I need sorted, it's just odd