Phalaenopsis Orchid Leaves not Smooth

[Korimako]

Thank you for the reply.
The orchid is with my others in bright light but no sun.
They get a good water once a week.
Th3 roots now are not in good order although some good ones are starting grow.
I don’t understand why one of the leaves is half smooth and half rough almost like a line has been drawn across.
My main concern is that it isn’t something which will spread to the others. I have separated it now.
It possibly doesn’t get enough humidity.
When I water I sit them in a small bowl then carefully pour the water around the top letting it run through then drain the orchid well.