Hi RJ, I think you'll want to build a larger network all in one go instead of multiple separate ones.

Try the attached version, with the curves arranged in this way you can select them all and do one large network surface.

Some discussion about making larger surfaces for things that should be smooth here:

http://moi3d.com/forum/index.php?webtag=MOI&msg=1398.18
http://moi3d.com/forum/index.php?webtag=MOI&msg=1398.19

- Michael