I've landed triple kickflips before. To be honest, I can't kickflip properly since I flick the board way too fast. So the board always over rotates and it's just annoying. One day I decided to try to do a triple kickflip after landing a couple of doubles and it worked!
This happened years ago, now I can't even ollie anymore. When you stop skateboarding for awhile, you lose all your tricks, anyone agree? It's not like riding a bike, you learn how to ride then you're pretty much sure you'll always be able to ride.