Sorry to have taken so long to get back to you. I live here in the North East, so we've been struggling with a lot of snow, ice dams, and cold, cold, cold so I've had a lot of other things that I've had to give priority to lately.
I think the best way to handle it is to put any credits under the main title that apply to the entire movie, then the credits for the separate sequences can go under those separate titles.