Hmm, when I tried the tool it didnt mention the 49ers or the Raiders, and although I live a 3 hour drive away from either stadium I'm considered in their local viewing area.
Since you get the Philly locals, whatever is shown on those wont appear on the sunday ticket channels. What I do is see what games are scheduled to air locally and record those, and then look for other games that arent aired locally on the sunday ticket channels and record those.
While you get the Philly locals, if you're physically in an area that other local stations claim as their 'viewing area', even though you dont receive those channels, the games aired on those stations might be blacked out on you in sunday ticket. If the games arent sellouts, then you might not get them either. In these cases, unless you have an antenna and can pull in those stations, you're SOL.
Then there are random blackouts that happen in some instances where someone forgot to throw the switch.
About twice a year I get sporked when a team doesnt sell out, then they have a last minute sell out or the blackout gets waived, and they change the local aired games at the last minute and black out different stuff on sunday ticket. The "game search" feature is supposed to then find and record the game on other channels if its available, but that so far has never ever worked for me.