Cant transfer spreadsheet through iTunes to iPhone

I have a MacBook Pro and am trying to transfer a spreadsheet in Numbers from the Mac to my iPhone. I found how to do it through iTunes and followed all the directions. Where I am having the problem - it looks like once in iTunes under apps under the phone icon - it isn't opening the specific spreadsheet - it just says "numbers.app" in the doc column so nothing is transferring over to the phone. Help please!!!