Yes, after doing some searching, it seems that it is a universal problem with viewing the rear mirrors thru flat windows. One solution is found over on the irv2 forum where a guy mounted a black sheet at an angle to block the reflection in the area of the flat window used for viewing the mirror. Hard to describe, but below is a link with pics. I think I will try it as it is simple and inexpensive.
Reflection on driver's mirror & window - Page 4 - iRV2 Forums