UPDATE: SOLVED! We had mistakenly entered the expression for our team, instead of the given team ID # when mass updating Sched_NextYearTeam for students. We just searched by the expression to make the student selection and mass updated to the right ID code #.
We have encountered an issue where students are not loading into course sections by team. We have established each student's next year team, each course preference is set to schedule to pre-established teams, each course section is assigned to its respective team, and each section's assigned teacher is set to the team.
(Possibly relevant is we started with a load-only scenario with more periods than last year's master schedule. We then copied over last year's master schedule, and edited all the courses and sections to increased-periods master schedule for this new scenario. Not sure if, while the system can actually enable this, if this somehow creates underlying issues.)