Hello and welcome to the forum!
I would suggest clarifying a few points before specific advice is offered. First, do your iPads have different names? Second, are you syncing to the same computer w/ iTunes (i.e. were both registered to the same iTunes). Third, are you on the same Apple account, and finally how is your syncing setup for the devices (e.g. all automatic, manual, partial syncing, etc.) - answers to these questions would be useful. Good luck!