I just realized. Well first I know for a fact this is a dtv problem. Next is the tv doesn't matter. It happens in the tiny video window too so it's got nothing to do with the tv.
It's really no ones fault. Different manufacturers have different settings, so DIRECTV may tweak something to work a little better with some and it might be to the detriment to another. The only perfect solution is for them to give us raster controls. They can't make it perfect for everyone's tvs off one setting. No one can. Most devices over scan far more than needed to avoid the issue, I'd rather the get it closer to the edge and see more picture.
Both of you are correct. Yes, it's DirecTVs fault, IF you call it a fault. Many televisions are guilty of setting the default overscan to too great a number. This makes it display a larger picture, at the cost of the loss of the edges. CRT TVs were notorious for this. (The HDNet test pattern had a screen designed to show the overscan of your television, alas the test pattern is no longer being shown.
) Recently, the broadcasters have come under fire (by who, I am not sure) for sending out an overscanned video signal, so they have responded dialing back the amount of overscan. This has resulted in some televisions seeing a scan line or two of the vertical blanking interval on the top of their visible picture.
Yes, you will see it in the small picture-in-picture image first, sometimes even if it is not in the main picture. This is because the PIP does not have the same image boundries (the console:D) that the main picture does. If your television does not allow you to adjust the picture "size" or "overscan" then I can only suggest you send a letter to the manufacturer and ask about it. DirecTV is very unlikely to change their settings to suit you or me.