You sure you didn't hit 1st or 3rd while doing that? I can't skip gears, except down to 1st (which seems to be a specific case). Matching revs or trying to double clutch doesn't get me into the lower gear at all. It's sort of ok, but if you mis-shift (let's say 3rd down to 4th instead of 2nd, or 4th->3rd instead of 3th->5th (eek!), you need to go back to your starting gear before selecting the correct one - which is pretty weird.