I think that I know what’s going on with locking the enchants – we’ll fix that in the next update so that it doesn’t swap around on you when locking.
And yeah as for 2x sinful ranking a little higher… it is what it is. The difference is very tiny so use whatever setup you prefer. It’s not unusual for things that are really close like this to shift around a bit when a new tier of content comes out. Celestial Guidance was more dominant early in shadowlands – primary stats tend to tail off a bit towards the end of expansions with how WoW works.