Hi Burr, no it doesn't really work like that for 4 curves - for a 4-curve Coons patch the curves are touching each other end to end forming a ring.

The ones opposite one another are not determined in that case by selection order, only by their relative placement in the ring which is a geometric arrangement, not a selection based one.

So like if you numbered the curves going around the ring like 1, 2, 3, 4 like this:



It pairs #1 and #3 opposite one another, and #2 and #4 as the other opposite pair.

In that case it is all determined by how the curves touch each other.

- Michael