Phal NOID with variegated leaves?

[Margit]

About two weeks ago I purchased a small NOID Phal in one of the local grocery stores.
The plant looked very healthy and was growing a new leaf, so I decided to take a chance, especially since it was half off!
It has been a little over a week now since I put it into my kitchen window and I have started to notice that the two upper leaves are developing a lighter colored outline. It looks very pretty I think.
What I would like is some reasurance that it really is a variegated leaf Orchid and not a problem.