Thanks so much for the first question, I thought so but wasnt sure.You just overlooked the answer to the post you quoted. This is not an issue, only "cosmetic". And: If you want to set the option, hold the Select-button while booting to access the Luma settings.
Do you mean "Switch the hb. title to the current app" in Rosalina menu? It should work (just tested it). Download the latest Homebrew menu (again) and place boot.3dsx in the root of you SD-card.
https://github.com/fincs/new-hbmenu/releases/tag/v2.0.0
I tried the "Switch the hb. title to the current app" but it says operation fail (no suitable process found) ?