The resistance measurement can be affected by other components on board if your meter is measuring using an AC signal. I have the same issue with my LCR meter, and thus don't use it to measure the resistance of resistors in a circuit. (In this regard, the resistance measurements on your inductors also may be off.)
If you have a meter that measures resistance using DC, that should work. If not, I recommend un-soldering one of the resistor's leads from the pc board and take your measurement.
EDIT: If you do measure the resistor in circuit using DC, it may take a while for the reading to stabilize due to the capacitors in the circuit. They will draw current and throw off the reading until they charge up.