Multiple Cleaning Tapes

I have a library

I have two slots ID'd as cleaning media.

I have a clean tape in each slot.

When a clean is called for, it always pulls from the same cleaning slot.

If that tape has max'd cleanings, it does not recognize or attempt to use the 2nd one.

Is it not functional / possible to have two cleaning slots?

The intent is that it doesn't force manual intervention immediately, when slot 1 is used up, go to slot 2. That provide plenty of time to cycle in a new cleaning tape so two are always available.