Two Alerts for every email message. Gmail?

Question

for only the past few months, my 3GS iphone began alerting me twice for every e-mail message received. I think it may be tied to using gmail, specifically.
It appears that when gmail gets a message, the phone will make it's new alert sound and a new number badge will appear over the mail icon.
When I open up the app, there will be no new messages in the inbox. Upon opening the inbox, the mail app will then initiate checking for mail on the server, and will download the files. When they are downloaded to the inbox, then the iphone will alert me a second time.
Of course this sometimes happens without initiating a check with the mail app by opening it -- when it's fetch schedule completes and finds something new and downloads it to the inbox on its own, it will also ring a second alert.
Does anyone know how to stop this from happening. I don't remember making any changes to the account info when this mysteriously began.

Answer 1

I had the same issue as well. It is just the way gmail works with the mail app on the iPhone. What I did was set up Google Sync through exchange and now have my gmail pushed along with contacts and calendar. Then I turned off the original gmail account I set up on the iPhone. Now when I get a new mail, there is only one alert and when you go into the mailbox the email has already been downloaded and is waiting to be read.