I'm not sure what your detail reports look like. The ones that I get have each individual judge's individual scoring of each element. Looking at them, I sometimes wonder if the judges were watching the same program ... the most amazing one was a range of 3.75 down to 1.75 for skating skills. However, as long as a judge is consistent from skater to skater, it will even out as all are equally impacted.
Spins seem to be a point this year. Some comps are calling them strictly and by the new rules - the slightest divergence above the horizontal on Sit for example will result in a call of Upright instead of Sit - others are slightly more generous. Again, as long as it's consistent skater to skater ...
In terms of how much growth you can have in six weeks: it can be huge. At the young ages, things can suddenly "click" which have been missing or worked on for a long time. Also, the first skate could have been on a day when the skater was contending with illness, new skates, new blades, a rough spot they hit on the ice ... and the second skate could have been at their "normal" level. As an example; my kid had a pulled muscle, thus, couldn't get down in the sits properly, or extend on the camel very well; 4 weeks later, when healed, the spins were back, and the points jumped, as did the skating skills scores, as the ability to stroke, interpret and do the transitions was far higher healthy than injured.