Am I Using Curviloft Right?

Ladies and gentlemen, I have an issue. I am trying to get two (possibly one if i can join them) faces to connect to another while following two contours. I’ve tried to do this this but it always ends up wrong. Can I get some assistance please?

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The bottom photo are the two faces that are to meet the one in the first photo

You will get better assistance if you upload the .skp file