I registered the license key from the retail boxed version of BDAV that I ordered from Newegg.com. Why does the product registration show 725 days left and the online account shows 729 days? I was on day 5 of the trial version. Is there any way to synchronize the software with the account so that the number of days is the same in the software and the account?

I do not know if they plan to fix it and syncronize them eventually, but right now, the only valid number is the one residing in your account. The one displayed in BD is off most of the time. Like if you where to install BD on another computer in 6 months and use the same license, chances are it would tell you you still have 730 days, while your account would say around 540.