completing repeating reminders isn't easy

This seems fairly new -- anyone else experiencing this? I have repeating reminders in the Reminders app. When I want to complete multiples, I'll check them off, but I have to wait, after each -- because they jump around! They don't really seem to be sorting themselves (into date order) or anything - they just seem to be randomly moving throughout the list. If I try to quickly check off 2 or more repeating reminders, I inevitably check off the wrong ones, because what was in a certain position one second is not what's in that position the next.