Having both weekly and monthly recurring services in the same proposal is not supported with the Classic proposal editor. You can, however, create separate proposals for each.
Check out this article to learn more about how weekly billing works with the Classic proposal editor.
✅ Note: we do support multiple billing schedules in the New proposal editor, please see this article for more information: Billing Rules.
And if you need a hand with this at all please reach out to firstname.lastname@example.org