Creating landscape with flat/disconnected contour lines

I’ve got this set of contour lines that I’ve had to overlap in order to cover a larger area. The overlapping isn’t perfect which means that I cant join the lines, I haven’t gotten to the patch command yet but I assume if the linework isn’t connected it’ll be a problem?

Does anyone know how to connect the Linework? and secondly, is there a way to automate the distribution of the lines in the vertical axis? (not too keen on individually moving each contour line up)

contour lines.3dm (8.1 MB)