I observed one funny thing. I have the habit of installing the applications directly from Android market on PC.
How to install the Apps directly from PC ?
Ans: I have a Google Account. I open the https://market.android.com/ site on PC and login with my Google Account. I have set this Google Account as Primary Google Account in my Android Phone. Now if I Click on Install of any application on my PC, I can see the same application downloading on my phone's notification bar.
I saw the application 100% downloaded. And I wait for the application to be installed. Of course after downloading the application my phone will automatically installs the application. We need to watch thats it.
But most of the apps are getting downloaded more than once. I don't know why it is happening ? I saw the application downloaded 100%. But again starts a fresh download without doing anything.
I remember while updating the Google Maps and Facebook had the same issue.