AeroPod, PowerPod and Newton

In Isaac I've done 6 different sets of intervals by using Device - Edit Intervals and then after I am done filling in the steps for each set I've clicked "Send to iBike".
When I enter Fit train mode in my Newton unit and choose iB3 to access my Isaac user programmed sets, it seems though as only the last interval set that I sent to iBike is stored in the unit. Can the Newton only store one user programmed interval set?

Moreover I am wondering what the following modes are used for:

FAt
Crdo
Strn

Isaac stores only one user-programmed interval set at a time.

Fat is an interval set that is based on calorie burning

Cardo is an interval set that concentrates on building cardio capabilities

Strn is an interval set that works on building strength.

Thanks for the clarifications.
My obvious feedback for next firmware release is that it would be nice to be able to store several user programmed interval sets on the unit