Agratronix Bht-2 and HT-PRO inconsistent readings

I am baling Bermuda hay and I was not 100% sure that my bht-2 was reading correct seamed to read lower then what it was at so I bought a HT-PRO to have also and now I am more confused then ever as one seams to read high and one seams to read low. I have version 1.3 on my Bht-2 and have calbrated my Ht-pro. Is this common and what do you do as I know I can Ajjust the bht-2 but how do I know what one is right. For you guys baling Bermuda hay in small squares what it the highest and lowest moisture you bale at.

Agratronix Bht-2 and HT-PRO inconsistent readings