Thanks MJ.

I thought it quite unusual too, I'll leave it alone for now but keep an eye on the others and for any movement in the door alignment.
That door needs some body repair some time as the previous owner dented it right where the internal crash bar is! Perhaps something to sort out at the same time.
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Cars...
'93 Audi Coupe 2.0 Alpine White (sold)
'99 Audi S4 Merlin Purple - K04 upgrade to 412hp (sold)
'00 Audi S8 Agate Grey (Sold

)
'11 Audi Q7 4.2tdi Unknown Red (Classic Red Pearl Effect - thanks MJ)