ItemAdded Event fire 2 times

Hello Folks,

I have written multiple Event Handler on custom list in past and all ran successfully. However, today I have written event handler on InfoPath Forms List and ItemAdded event run twice. After debugging, I got to know that ItemAdded and ItemUpdated event fire bit by bit like below:

ItemAdded - Execute few lines of code

ItemUpdated - Execute few lines of code

ItemAdded - Execute few lines of code

ItemUpdated - Execute few lines of code

...

...

I don't understand why ItemUpdated event get fire when I submit "newly" created infopath forms. When I save&close existing form then it run once only. Issue getting me crazy now. Please assist.

Thanks, Chintan