I have a Mitsubishi WS-55517 and think the overscan is off. I Tivoed the HDNet test pattern last night and I can only see to 6 on the top, barely 12 on the left, a little past 12 on the right, and a good bit past 10 on the bottom. Is this correct? The pattern says I should be seeing 4 on the right/left and 3 on the top/bottom.