Oncidium wildcat problems

[GregorK]

hello
You guys helped me with identifying this orchids and i had problems with it in the past. And now i have problems again.

The leaves on the new growth are not growing right.
harmonics type of growth... I dont know how to explain in english.
I read somewhere that this happens becazse of not enough light and too little watter.
But it is placed in a west facing window and it is kept moist all the time.
Any suggestions? The same thing happened on a previous growth.
photo included

Gregor