@Laura_P, yeah that is annoying and frustrating problem with recurring tasks and associated subtasks.
Discussed at length here…
To Subtask or not to Subtask - #6 by James_Carl
And also here
Recurring task and subtasks due date link
For Meetings the best way is to create a specific project to handle each meeting.
Have a look at this guide link
I personally use meeting projects for all my regular meetings. And also a specific My meetings project for the Ad-hoc ones to record my notes. Happy to share the format/screen shots of that would help.
Jason.