To answer the question in your last paragraph: no.
8.4 A Jammer pass, either initial or scoring, cannot be initiated by entering the pack from the front. If
a Jammer who has exited the front of the engagement zone is then swallowed backward into the
front engagement zone and/or pack, she returns to her previous pass (see Section 18.104.22.168) until
she again re-exits the front engagement zone.
8.6.6 Jammer Lap Point: If one Jammer completely laps the opposing Jammer, she will score
one (1) point each time she fully laps her.
One way to think of it is with the now-popular spiral staircase analogy. For instance, when a blocker is touching the jammer line on the jam start whistle, she is an entire lap ahead of the pack. Or, if the track were a spiral staircase, she is one full turn "above" her teammates. That's why she has to wait for the pack to skate an entire lap to catch up with her or skate CW all the way back to the pack or she gets a false start major penalty.
When the scoring jammer is swallowed back into the front engagement zone on a pass, she is back on the scoring lap she just finished. The difference being, since she already left the front engagement zone and started her next scoring pass, she is now unable to score any points she may have missed while she was initially on that scoring lap.
Interestingly, though, if the opposing jammer was winded badly or had a seized wheel or something and continued to skate slowly while the pack was racing with the scoring jammer still in the pack, you could get your 7th, 8th, etc. point. On the other hand, if the slow jammer took herself off the track for equipment failure or lack of wind, the scoring jammer would only get a maximum of 1 point per scoring pass since the other jammer would now be a NOTT (ghost) point.
Has there ever been a scoring pass recorded over 6 points? Does anyone know?