Welcome to the Orchid Board!
Several issues here. Orchids grow slowly. Don't cut things off. Without a photo, it sounds like you may have cut off the growing tip of the plant. If that happens they will always make more growths from the base. These extra growths are good for the plant, and form flowers. You get a much better show if you leave them on the plant.
Vandas require much more fertilizer than other orchids. Martin Motes of Motes Orchids in Homestead writes he uses a tablespoon per gallon of MSU fertilizer at every fifth watering. He waters once or twice per day, depending on how hot and dry it is.
Vandas need high light but can't take full Florida sun. People succeed under some shade cloth and under trees with a partially open canopy for dappled light.
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