@sangio7 Hummmm It seems The Pinnacle is now down at Yauok. I've seen previous reports that sites such as Hackett etc are being pinned to Yaouk. Not good. Doesn't help your stats for The Pinnacle but it seems that the is has been a greater number of sightings for the Small Grass Yellow this year.
Excellent photos. The dorsal views rule out P. cinerea, I think. Yes, possibly Prepalla (genus) but this seems to another case where identified photos from life would provide a better basis for ID if they were readily available. I note there are several Prepalla spp. listed on iNaturalist without specimen photos as yet. Wendy, it might be worth have a look at Ian Common's monograph 'The Chezala' (Vol. 2) if you have access to a copy. I will create a category for Prepalla (genus) at least as a placeholder hoping the might be resolved in the future.