Preview anomaly and curve projection on surface error

Hi everyone. I projected a grid of variably sized circles on a simple U-shaped loft surface and received some errors, usually at the ends of the surface. Some circles are missing, and some are squeezed. Some generate a line connecting them to the edge of the surface.

I tried rebuilding the surface and the input curves with different methods; I've also built  it directly in GH. If i keep the same or slightly different shape, the problem always remains in some form, but different shapes of curves don't have the problem.

Originally, some rows of the circles even formed lines tilted in a wrong angle, crossing the correct ones (along uv). This part of the problem stopped after i moved the whole geometry close to the center of rhino coordinate system, but the rest remains.

My second question is a phenomenon I encountered several times already. in certain positions of the rhino camera, the GH red preview geometry seems to display a second, horizontally and vertically mirrored version of the original, that is basically "randomly stuck in space" in the model. To see that in the file i attached, zoom the perspective so that the camera position is right in between the two vertical sides of the U shape, above the horizontal part of the U shape. and then just look around by rotating the camera on the point.

The attached image shows the projection problem on the right and this display oddity on the left

I would be very thankful if you check it out!!

Have a nice day