Damage on Phalaenopsis leafs - what could it be and how to cure it?

[LuizaG]

Hi

My Phal has some damage on 2 leafs and I have no idea what it could be. This is my second phal and I really do not want this to get into a terible state like my first one. I really need help to find out what it could be and how to cure / prevent it from spreading.

Here are photos (at the botom of the page) with the leafs:
Picasa Web Albums - ChristiLuiza - Orchid

Also it appears to have a bit of a damage near to the botom of one leaf, at the crown. It was like this when I got it but now it seams to have gone worse.

It is poted tight into a 12 cm pot in bark and some sponge. It has been 3 weeks since I bought it and have not watered at all because it does not to get dry in the middle of the pot. (I insert a skewer to check.) I am really affraid of rot. For the first week I kept it on top of a saucer with water but gave up on that as the pot started to steam up inside and made the drying slower.
Last week I wiped the leafs with a damp coton ball with neem oil smeared on it as I've seen a small dark insect that moved very fast on the plant. Today I've done the same but I not sure if there are insecs eating my leafs or if it's a virus or something else.

Could you help me diagnose and treat?
Luiza