Rust or old age for this Paph

[Matorchid]

Hello everyone again,
This time I am inquiring about Paph. I got from trader joes( with a tag even). Well it's been 4 weeks and last week one of blooms(I say one because there was a second when I got it, thought these only made one) more on that later.
One of blooms these 3 rust color dots on dorsal sepal everything seem to be fine but since last wee that flower has now turned brown and is goner, you see in pick. Ok was thinking it was time to drop. Yesterday how ever on second flower a sm patch of front dorsal sepal had same color to it as the dots, well today I have examined it again and that patch is a little bigger.
I haven't watered it or sprayed it or anything in past few days. He is not repotted and showing no signs of growth, I was waiting for a new leaf or something. I also noticed a bottom leaf turned yellow with all the markings almost gone. I again thought that this is just the end of its cycle. The rust color blotches and spots is really what me worried.
Plz give some feed back, I always thought these were very difficult to grow and that is why I stayed away from them, but this board is sayings it's beginner plant and I would be very interested in growing these in my collection as well.
Plz feel free to chime in