abt
BT
the thing that really sucks in PT compared to tracking in Cubase is that you can't overlap items on a track, because if you do, the one below gets deleted. But the playlist feature is pretty convenient. (note: this is how it is atleast in 7.x, I haven't used hd version of pt8, as I read it finally has the comping feature that has been on cubase as "lanes" for like... 6 years?)
I don't think they get deleted, it just trims the region. If you get the trimmer tool out and drag the end of the region out the wave is still there.