How is Regional Mind Unit scoring calculated at each Checkpoint?

The team score at each checkpoint is the average of the MU controlled by each team at the preceding checkpoints. This means if 1 team is way ahead half way through, they could stop playing, lose their fields eventually, and still win the cycle. The next cycle would start, however, and the score would be the average of MU active at each checkpoint.

Personal score is how many MU you have gained since the beginning of the Cycle. It doesn't count what was up at the end of the last cycle... so to stay at the top, your fields have to either be destroyed and you rebuild them, or you build more. It also does not matter whether your MU gained was active at the checkpoint, and even counted on the team score. I have seen mega fields destroyed before the checkpoint, but the players responsible for the fields were listed as the top agents in the region, though they were thousands of miles away.

Agent "Now" is simply how much MU you currently control (and is a part of your team score).

I can't comment yet Erica answer, that is correct for the Team score.

For the ranking of agent players in the region, it's different so it can be confusing if you don't know it. If you make a two million MU field and it is taken down before checkpoint, you are likely to be amongs the first in agent rankings for the cycle (even if this has not contributed for the team.)

If you make a big field and it stay alive all the cycle, it will not count more than if it's take down soon. If it still alive for next cycle, it counts for the team but you will not be in the area ranked agents for it.

And the score done in Agent stast "now" is still sometihng different.