SChamp79

I bought a 2013 A6 Premium Plus and trying to figure some things out about the features. However, today my concern is about tinting. I recently had my windows tinted with LLumar 20%. The side windows are perfect, but I'm having problems with the rear window where there's a line of lights from other vehicles. I've seen several A6 with tinting and was wondering if that was a common problem and owners lived with it or is there a special type of tint I should use to prevent this glare/distortion. Anybody has any suggestions/answers?

Distortion/glare after LLumar tint installed on rear window