I didn't even put my Accurite in this time. I only used the probe and stuck it on the outside. I know mine is wrong and I wasn't going to stress about it.
I used the white on that came with it, and the one I bought at the cigar store. That's all I used, and I had a mostly perfect hatch. All chicky's navels were healed and everything. So I feel pretty good about it.
Thermometers in bators are simply a nightmare. Matter of fact, I didn't even look at the temps really. The only thing I was worried about was the temp inside the water wiggler. I had tested that with 2 human thermometers. One I knew to be more accruate and they both agreed, so I mentally up my water wiggler temp by .7 and I'm good. Temps were good the whole time.
Sorry you are having a hard time with it. I did the first time too, and still my hatch was screwed up. Gotta spend the money to get one you know it right, if that's even possible. Maybe it's just a matter of siking yourself out to just think it's right. I don't know. I do know it's a huge headache.