I upgraded from a 722 dvr from a 922 dvr about a month ago. After the upgrade I noticed that the volume between tv1 and tv2 differ drastically. By using PIP to swap tuners that are on the same channel, i have to adjust the volume on my tv from "15" to 30-35. Another change that was made was to backfeed tv2 so that it could be viewed in another room, could that have something to do with it? Any idea's?