Is anybody else a member of the "So Terrible At Counting That I Submitted Three Wrong Answers to Dim Sum" Club?

Hello, also about Curve Data. I also don't see any mistake in my work but the answer key didn't work. I tried different version but none seemed to work (length of segments as corrected in a previous post, number of case in each segments as in the example's key...) It's also very possible I made a mistake, but I can't find it, so I don't know.
Have a nice day !