Hi Graham,
to your questions:
1. P and P2 usually differ in the use of a different drum set. For example, in the "Easy listening" category, the "8Beat Adria P" style contains the "Rock Kit" drum set, while the "8Beat Adria P2" style includes the "Drums" drum set.
2.To eliminate the unwanted sounds, I first applied the RD-Cleaner,
followed by the detail work with the help of Mix-Master. The "DrumKit View" within "Mix Master" shows the exact key assignment of the original voices. Typically, in a case of unwanted sounds, an original voice must be replaced by a similar one (from the T5). To find out which original voice produced the unwanted sound, I listened to each voice and replaced it with another if necessary.
Then I saved the style with the changes within the drum set.
Hope you have fun with the styles.