Hi Andy,

re:
> I have two sweeps left, as you can see this one does not follow the guide lines and
> instead creates a bulge. What am I doing wrong?

It looks like you're not doing anything wrong, but sweep is having some problem with automatically determining the proper orientation of the profiles.

Try using Network for that problematic one instead of Sweep. With network select all 4 boundary curves before running it.

- Michael