The Teflon tape won't hurt anything.... it just doesn't prevent anything (i.e. leaks), so don't worry about tearing something apart that isn't leaking. Sounds like you have a car someone else built. If it were me, for piece of mind, I would replace the fittings that are leaking. Also, is your remote
oil filter aluminum (is your leak at the block plate or the remote
oil filter stand?) Be very careful screwing those AN fittings into the aluminum..... they x-thread very easily and that remote filter stand ain't cheap (this is the voice of experience speaking).
my $0.02