You should try to open the spreadsheet you made on the iPAD using the applications Numbers located in the folder "/Applications"
You actually have two versions installed. You are most likely trying to open with the previous vesion which is located in the folder "/Applications/iWork '09"
Numbers '09 Numbers 2013
Version 2.3 Version 3x
check and see what version you are using. you should use the one that has an icon like the one on the right