In the information age, I don't see a need for ordering peaks with a letter appended to them any longer. There are several other characteristics to distinguish peaks that are readily available in the lists and peaks' profiles, including profile links to the parents so there is no question which peak the parent is. The A, B, C lettering convention in my opinion is baggage we're carrying forward from the days of paper and lack of software automation.
Not only is it difficult to remember which letter the said peak is supposed to be, but the lettering can change at any given time. Let's say the Board on Geographic Names adds another Sheep Mountain to CO or another Bald Mountain to CA. There are 52 peaks currently named 'Bald Mountain' in CA and 34 peaks named 'Sheep Mountain' in CO. That is how many peaks are possibly going to increment one letter based on the height of the newly named peak. If someone had used 'Sheep Peak X' in a register or a trip report, then that information is now defunct since the name applies to a different peak now.
Unless there are valid objections, I will be eliminating appended lettering for peaks with duplicate names.