The “RefitTrim” tool is very inaccurate and almost always produces surfaces whose deviation is way too bad, including border that’s moved away from its original position. I often try to use it and the majority of times I simply give up and use “MoveUVN” instead. Or I simply trim the surface and accept the fact that the trimmed edge will lead to multi-span adjacent surfaces. If possible, I use “Match surface” with the “OnSurface” option to minimize the amount of spans and control points (compared to matching to a trimmed surface edge), though a robust “RefitTrim” like the one in Alias and ICEM would be the best way to do surfacing.