If the auto function is working, and there is sufficient refrigerant, but you find it more comfortable with 2 or 3 blue dots, then run it there. It may be that it has been warm out recently, and the system and ducting just needs to cool down to get to a steady temperature.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue