That little green thing is a new root and that means that Vanda is a very happy camper
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I live in Kissimmee Florida right by the mouse and I mount all my orchids on bark pieces and hanging wooden baskets with osmunda, I summer them from spring till the temp goes down below 50, I bring them in Feb-March I put them out once again (usually weather is nice till about Jan 80 plus day and 50 plus night) in the spring or early March outside they go. I have found that they love to be mounted ( they live in nature) rather then pots which produce to much wetness and rot .Welcome
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and good luck growing