When you have two leagues that play the same night/share common locations but don't have the same reserved dates it is best to generate the schedule together but specify the different reserved dates.

Video: How to add different reserve dates for two leagues

Go to Menu > Manage > Schedules/Charts > Surface Scheduler.

Click on Generate schedule

1. Options

Recurring dates. (Add the furthest dates you need for the one league that needs longer then the other)

3. Choose a round-robin/league and reserve the dates you need.

Note: It's quicker to be in the ALL, to add the common dates that need to be reserved. They will apply to both. Then select the round-robin to add the extra/specific dates you want to add to one league only.

Do the same for the other.