It's a Brinsea octogan advance ex with humidity pump. I have a spot check thermometer too and that showed pretty reliable temps. I did 37.5/45% humidity until lockdown and then 65% at lockdown. Autoturn was on. 2/12 eggs were infertile, I had some early quitters and then a few that were mostly developed that stopped just before hatch. It is Brinsea's own recommendations that I have followed. Of note the eggs are shipped.
Shipped eggs are always a gamble, and depending on the distance of the trip, number of transfers, altitude change, extreme temperatures and just shaking the heck out of them could cause both early and late losses. You might want to do a test hatch of local eggs just to tweak your incubator settings and eliminate the shipping variable.
I have the exact same incubator. Mine tends to run 0.3 degrees hot, so I set it at 99.4. I am at a higher altitude (5,000 ft.) so I start at 35% and adjust weekly like Amy mentioned. I don't double check the humidity since I'm watching the air cells. My local eggs hatch great, but shipped have been anywhere from 2/29 to 13/28. They all came from lower altitude though, so that's an automatic strike against me.