I have read where people will slightly over fill by performing the top off at 20-25c (best to monitor temp with scanner) or lift the fill side of the transmission slightly higher by being on a sloped driveway or one notch higher on the front jack stands.

As up all night pointed out, the fluid amount is changing from about zero to maybe 100c, so 100°c difference. It's the 70° difference above the cold fill that makes the bigger volume difference. I would definitely re check the fill level while temp is about 25c

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)