What OS are you running, LoboLives? The behavior you're reporting here sounds suspiciously like a bug that was squashed a while back, somewhere around beta 1.4.0.15 if I recall (though I'd have to check the change-log to be sure).
Unless, of course, I'm misinterpreting the issue, it's also possible that you have the roll function in the wrong mode: i.e. retrig instead of arp.
Cheers!