One important distinction to keep in mind, first. The use of the word "Group" on the Team Registration form is different than the use in the Tournament System! On the Team Registration Form, we ask Club Directors/Team Reps to tell us what "Group" they want to start with among FIVE groupings. Those five "Groups" represent (1) Top 20% of all teams in that age group/realm (east/west); (2) 21-40% of teams; (3) 41-60% of teams; (4) 61-80% of teams; (50 81-100% of teams. That grouping sets the team's INITIAL points value in the Tournament System ONLY. After a team plays their first tournament and their points begin to go up/down, the "Group" on their team registration form is irrelevant as they are ranked based on their currents points value.
The word "Division" in the Points System is used to differentiate between SITES only. We will have as many "Divisions"/Sites as we can accommodate to allow as many teams to play. So, our bigger age groups will see 7-9 "Divisions"/Sites on a tournament weekend (but remember, we only had "five" on team registration form - so those two uses have nothing to do with each other).
Teams get assigned to "divisions"/Sites based on (a) their points rankings AND (b) how many teams ranked above them have entered that particular tournament! So, a team that "registered" as Group 2 (21-40% of teams) could play at "division"/Site 1 if there were not a lot of teams ranked ABOVE them entered in this tournament. Teams are still assigned into tournaments on their rankings so they are playing teams ranked around them.
Please see the Junior Tournament Structure and Information Letter and the Site Assignment Example for more information.