problem

So I was playing on the candy parkour, and I was on cp 11. When I came to the last jump of cp 11, I made it on the first block of cp 12, I set my cp. But when I set it I fell off. So now whenever i teleport to the cp, I fall off and I'm not able to get back on. Please help me out.

I'm making a bridges map to submit to the server, and I want to use worldedit to generate the iron ore, but worldedit says it won't let me use ores. Can somebody please explain why?