Serice, I completely understand your going back over every frame during each game. While I'm bowling in sanctioned competition, I keep a frame by frame log of everything that happens. If I don't strike, I'll even designate the pin(s) left standing after the first ball just above the frame entry, so that I can track every move that I made during each set. Some bowlers think that I'm a little bit overinvolved by tracking every frame, but it can easily show me statistics and patterns developing that would otherwise be lost as soon as you go to the next frame. And, by my record keeping, I can tell you that I have left as many as 14 10-pins in a single 3 game set (3 in the first game, 5 in the second, 6 in the third), but stats such as these would be lost without my recording every ball. And, I can easily spot trends such as leaving certain pins on one lane or the other, and this info allows me to make better selections on adjustments. And, at the end of a good set, this bookkeeping allows me to easily refer back to how many strikes I had, what pins cost me an honor score, or whatever. And, I can tell you that from my statistics, it normally takes about 18 strikes (on average) to shoot a 600 series, where it typically takes about 23 or more to shoot a 700 series.
Keep up the record keeping.....it does come in useful at times, and it gives you something to do after bowling each frame (kind of like a post-shot routine).