The psittacina is a different matter, and it sounds like it is fighting
for life. If possible, I suggest replanting it into a pure live Sphagnum
mix, using your fluffiest Sphagnum available---preferably established
stuff. Clean off all dead and rotted growth. Unfortunately, sometimes
when a Sarr starts producing lots of little distorted and short-lived
leaves as you describe, its days are numbered. Keep it moist but not
soaked, and maybe it will pull through. Meanwhile, keep it from all your
other plants. While I've never encountered them, I understand there are
some pests which can bore into the rhizome which would be very bad.
Very ominous behavior.
Barry