Spots = Normal
Hi there. Just had to throw this out there. In the third picture, the top leaf that looks like its been sprinkled with tiny dots.... I notice this happens to my vandas/ascocendas if I hang them too high in my shade house. I asked my local supplier about it and was told it's not sunburn per say, but rather 'freckling.'
Vandas are a lot like people in this respect... when people are exposed to fair amounts of sun over long periods of time, say their lifetime, natural variations in pigment deposits are darkened, creating what we know as freckles, sun spots, age spots, etc. Your vanda simply has some freckles from being exposed to the high light levels necessary for their culture. As mentioned by vandavixen, some vandas are more prone to this type of spotting due to their genetics.
I personally have found that my ascocendas are more prone to this spotting behavior than vanda x vanda crosses or species, likely due in part to the original ascocentrum parent. Ascocentrum, at least in my experience, are almost always covered in reddish/purple spots. There's a thread on this phenomenon titled 'Ascocentrum ampullaceum' started by Toddybear.
So, my verdict... your plant is fine but keep up with the physan for a bit longer just in case. Hope that helped.
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