I don't know if this is C2 or appMobi bug. Anyway, here it goes:
This doesn't work on IPAD (tried on IPAD 1 & IPAD 2) appMobi export:
<img src="http://dl.dropbox.com/u/10318013/soundproblem.png" border="0" />
The second sound doesn't play never ever.
The cap file:
dl.dropbox.com/u/10318013/soundbug.capx
It works on the IPAD emulator by the way, but not IN the Ipads.