duplicate emails

I have started to get duplicate copies of emails shown in my All inbox.
I have two gmail accounts, both of which get the same emails. If i delete one then the other also deletes. Any ideas version 7.2.33988.0
See attached error

It sounds like you set up the same account twice.  If you go to menu/tools/accounts, can you see duplicate accounts?

You also need to make sure when you setup your GMail account, that during the 0Auth process you use the correct email address for that account. Otherwise you end up with two accounts, apparently using different email addresses, but the 0Auth is connecting to the same account on the server.