They do now apply grease to the new design of Ohlins seal...the new design came in about 18 months ago, and if the fork /seal has been installed correctly then it should show a little 'moisture' on the fork bottom halve...this is the grease on the seal, but it should only be there for a short while...i.e. 20-30 miles.
Wipe the fork and then have another look...it shouldn't be 'oil' IMHO.
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