Reminders should make the next time they pop off when you select done, not based on the time frame from the reminder itself. For example I have a reminder to change GFO every 6 weeks, but sometimes I don't get to it until week 7 or maybe earlier week 5, the reminder is still 6 weeks from the original date no matter what.

Would be a great problem to solve since I have to then go in and adjust the date of start all the time.