Surface Split - List order comparison

hi,

when using the Surface Split comand the output list will all be shuffled compared to the inserted curves geometry. I know the "domain edge" isocurve will duplicate at least one value of the list (surface domain 0 to 1 and from 1 to 0) but why all the list order seems shuffled up (and not only increased just by 1 value)?

I would like to use the sort list component but due to the geometry I am using there is no rule or value (as distance, point location or vector) that can be used to sort the list.

Any suggestions?

I attach a short example.

Many thanks,

kiara