I have applied on Google adsense with different Email ID ( Not Gmail). Its more than 20 days now....and they are showing message that application is under review. How much time it would take?
I think it's more safer if you only apply once. Applying for adsense for more than once is not good and you might ended to rejected.
That seems like a long time. It only took a couple of days for my site to get approved for Google Adsense. You might want to get in touch with their customer support.