Priming calculator in the fermentation page problem

I've just noticed today that when you use the priming calculator in the fermentation window it is not linked to the bottling volume field. It's linked to the batch size field on the design page instead. If I change the bottling volume up or down the priming amount stays the same however if I change the batch size field up or down the priming amount changes as well.
Logically I would have thought the "carbonation used field" should be linked to the "measured bottling volume" field so that when you change the bottling volume the correct priming amounts are shown.

Cheers
Andrew

It is linked to the bottling volume on the design page (not the measured bottling volume).

I have it in my notes to allow either one to be used (as an option) for future versions.

Brad