It's a bit of a pain in the *** but I found this work around:
>> Open Inbox >> Edit >> Mark All >> Mark As Read
>> Open Inbox >> Edit >> Check/select the top message; it will highlight the move button.
>> Press and hold the move button and uncheck the message that you had checked earlier.
>> Lift all your fingers off from the ipad screen. iphone will give you the actual number of emails it has selected for the action.
>> Choose trash to delete all of them or any other folder where u want to move them, like one piece. Remember this will replicate your action on the server so you will ACTUALLY move them or delete them on the server and not just the iphone.