Regarding your replays:
Fourtissimo: Yes, this is a backroute.
A Move on the Roof: Backroute, but because this is a level in Outtakes, I won't fix it.
Poor Wee Creatures - Twin Edition: Slight backroute, but again I won't fix it.
It's hero time again! - 1min: Nice alternative solution.
Just a quickie - 30sec: Another nice alternative solution.
Time Out - 3min: That's a simpler solution than mine, but much tighter on the time.
@Simon: Haven't gotten around to apply your patch, but will do so eventually.