i would not pay any attention to that small amount.
when i am checking solenoids i heat them up with a hair dryer they can go from 30 ohms to 300,000 ohms or they can go to an open. (checking with them off the vehicle).
the one that went to 300,000 was on the vehicle idling and we checked it after we had lunch.
just heating it up will raise the ohms a little.
edit
of coarse if u have them off u should check the flow and maybe have them cleaned.