Can't always undo

Music.

I've been playing around with appls to figure out how to make it easier to transfer music from my itunes account to my phone. I think I found one that worked. At least I invested a lot of time and tried really hard to figure out their very simple instructions to find I got a few songs moved and then since I'm not good at recognizing what exactly it has done, I delete one. I'm not one to hesitate too much when it comes to pushing this and pressing that. Most of the time there is an undo button to restore whatever mistake I just made.

Not always.
TT