The “Last Focus Temp” value in the Focus Control is the temperature at the END of the focus run. I suggest it be the average of the beginning and end temperatures, which is more likely when the best focus value was found (usually about 1/2 way through the focus run). In the first couple hours of the night at my observatory it’s not uncommon for the temp to drop 1/2 degree C between the start and end of the focus run.