Underdosed? Or UnderFILLED?
Sounds like you're under by about a cc. I was under on two of my EQ bottles by .5-1 cc... on 2 out of 5 bottles. I credited the two I was short on by overdrawing on my end just a tad. There are several times that I'll be over by 1/10 or even 2/10 cc on a particular shot. Do 2/10 5 times, and that's one cc total.