I've seen a lot of times where the actual CD doesn't number the parts of a work, e.g., it'll just have the track number, then "Allegro" or whatever. (Most Naxos releases seem to be like this).
It seems a lot of times people add in numbers. That seems to go against the guidelines (which say to use what's printed on the release, and also show an example without the added numbering), but the added numbers are quite popular, so just want to make sure.
Work title: Allegro moderato
Work title: Adagio
Work title: Allegro e marcato sempre
(as actually printed on the release) vs.
Work title: 1. Allegro moderato
Work title: 2. Adagio
Work title: 3. Allegro e marcato sempre
(with numbers added—though it seems folks for some reason use an archaic number system—maybe they feel their I keys do not get enough use )