I spent many hours fiddling with this! As long as the auto adjuster is free and working, it will self adjust, but for some reason these rear drums seem to like to travel! I have stripped it down many times and replaced all the parts and still i have allot of travel, theres nothing else it can be other than a problem with the front calipers, and i have also inspected these a few times, I guess allot of it is just how golfs are! Im not sure exactly HOW far yours travels but compared to allot of cars you might find its just how it is.