Vishay Thermistor Reading Issues
R25 error is defined by the p/n suffix after the value 103.

This is likely the cause of both errors. 

Replace in SAP by (fine print in spec)

J=5%,H=3%,G=2%.

Adjust  offset for R25 error and B tolerance errors as required by your unstated system design spec.

Or get G tolerance part.  

Or recompute worst case errors and decide how to compensate with series R (select on test jumpers) to thermistor or other methods.


  But always create an acceptance criteria 1st before part selection and then do a tolerance stack up of all parts.