Detail pass works wont go to final pass to switch bit goes back to main cut screen

Have attempted 3 different designs. First design prompted the bits changing from detail to final pass. The last two designs keep stopping after detail pass and not going to second cut. I have tried letting it run through design twice on each of the last two and still wont prompted second cut saying switch bit. Still a learning and cant seem to figure this out. Anybody come across this???

As you go through the setup screen you click on roughing pass and choose the bit for the first pass, after the roughing is complete, change your bit. Then you go through the setup and click detail pass. On the detail pass you go through the questions you just confirm you used/using the two different bits.

hope that explains it