So the quarterback should have pulled and then run left on a keeper?
Yes he should have pulled. The counting starts with the inside shoulder of the tackle the line backer was basically stacked on the end and both were outside this position so they together are 1 and 2. Generally one of them will go inside to take the dive, and will be the dive read and the other will stay outside and take the QB. The Qb will read the area and whoever fills the position not a particular player. Not the easiest thing in the world but you need to be able to make the read to make the offense work and with the number of qbs in the past that have made it certainly not impossible. Good QBs even make these reads at the High School level. If both, lb and de, go outside to take the qb and pitch it would be a give read and the guard center and guard should be able to take care of whoever the defense sends from the back side to take the dive. If you would like I think I can find an article where Ricky Dobbs, he was a QB at navy a couple of years back, was asked about it.
About the numbering you had questioned elsewhere... You are right. It seems Griffin was the extra man on that side and he played the motion really well. Even with that if the QB make the right read the play should have picked up 3-5 yards. What is the saying though, if ifs and buts where beer and nuts then everyone would be happy
Also sorry about the delay. I had to go and run.