New baby vanda losing leaves

[Cilla221]

Hi
I am new to orchid board. I had a couple of phal orchids I bought from the grocery store about 8 years back that did great until I moved and they both died, so my orchid growing experience is limited. I found a pic of blue vanda a few years ago and really wanted one.. I finally got one about two weeks ago. I got this plant from orchids limited and it's a seedling I have never had a seedling of any kind.. I repotted it which I thought was the right thing to do but, in the last week 3 leaves have fallen off.. I am just wondering is this to be expected.. is there anything I can do to keep this plant alive? Also I tried to upload pics but for some reason they would not load..