The temperature you put in the calculator is the highest temperature the beer has been at after fermentation finished. It is trying to calculate the remaining entrained CO2 in the beer. The higher the temperature the beer is at, the less CO2 it can hold .... and when the temperature goes down again, it is no longer present to be re-absorbed.
Bottle condition anywhere within the normal recommended range for the yeast. Higher is OK too, but lower, and the yeast will stall (until the temp is raised again).
I gave up using calculators a long time ago. I just use 0.8 ozs table sugar per gallon, and it comes out fine for me.