Why do I get lines of 2 different colors in the mfuzz clustering analysis?

Question

[prithvi.mastermind]

I'm using mfuzz algorithm for soft clustering analysis of 3 genes. Based on which I obtained 3 clusters with each cluster having one gene.

I have obtained only single gene (i.e., LRRK2) in cluster 1, so why there are three lines of 2 different colors (i.e., green and blue) ?

If there is single gene, then only one line must be present throughout. Also, what does different colors signify in terms of membership.

[Basti]

It is hard to help without seeing the code your ran, and your related data