checkpoint parkour

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.

In Parkour Hard Parkours Like Dungeons 5-7, We Need Checkpoints. Dungeon 7 Is easier Than 6, and So I Propose That We Add A Checkpoint Or Two To Dungeon 6. Everybody that Plays On It Wants A Checkpoint <3

I had made a checkpoint of a parkour there when I died I then I went back to another checkpoint aff please help me