How does yours compare in size to the plant shown in this thread?
Vandra and Cattaleya
Note the plastic saucer under these two plants is 6" / 20cm across.
Ascocenda on the tag is the name for Ascocentrum hybridized with Vanda. Botanists have decided Ascocentrum plants should now be called Vanda. Many people still use the older name.
Is your Vanda seedling in the hot sun? They can't tolerate this unless you have a fan blowing on them to keep the leaves cooler. Especially when small they can only tolerate dappled shade without strong air movement. If you have it in the sun, move it right now.