Slowing down of progress
Mine seemed to slow down around 11 months too, and really picked back up about month 13!
I'd definately suggest a rosemary rinse, and perhaps hold back on the tea tree for a few days, are you still doing a lot with the salt? If so maybe cut back on that for a few days too, or try your darndest to keep it off your scalp? I hope it starts getting better, I know mine got worse when I stopped rinsing off in cold water since it got cold outside...maybe that could be a culprit as well?
its happening to a lot of mine too, I just ignore it mostly some I pull back down if they're not "very attached" otherwise if it's the same as what's happening to me it's pretty much what SE is saying, they're kinda blunting themselves.
from what I can tell and remember from conversations, while this can be harmful, if you go to doing nothing to them and let them heal themselves they should recover on their own! (don't quote me tho, it's late and I'm trying to remember exactly what I've read lol)