Sep was strong on account of 300k/d higher other liquids vs 9 month avg... I wonder if this is seasonal? How does this item compare with previous sep vs previous years?

No, it's not seasonal, most of the increase (two thirds) is coming from OPEC (mainly Saudi Arabia and Iraq).

September 2007 estimate for crude oil + condensate is 73.50 mbpd compared to 73.47 mbpd one year ago and 73.92 mbpd two years ago.