I explained on this post why it is not possible to change the behaviour of the undo in near future and offered a refund:viewtopic.php?f=183&t=56596#p347263
You later claimed to have gotten a refund for Cubasis:viewtopic.php?f=183&t=59875&p=360780#p360780
Why are you still here? I don't know what we can do to help you now.
Now you don't own the app anymore and are still writing offensive stuff which makes me close this thread.
Apps are created in incremental steps. And since the launch of Cubasis 1.0 we have been working hard to give our users missing features free of charge with every update. With every update we evaluate what is being requested most (not only in this user forum) and implement those features – and we will continue making Cubasis the most intuitive DAW for iOS.
Even the iPhone didn't support basic functionalities like copy/paste in the first iOS versions and that didn't make it a bad piece of hardware back then...