Dump sidebar in portfolio project-type?

When you display a set of portfolio projects that have the same project-type, with a URL like https://mysite.com/project-type/thistype, the template serves a 3-column page of projects with the rightmost column occupied by a sidebar that I can’t seem to switch off.
There was a similar problem in the single project post display, but I found a template edit in the Shapely forum that got around that.
Any chance of a quick pointer of what to do?

Great theme. I love it. The ability to have more than one portfolio widget on the home page, each tuned to a different project type is excellent!

Many thanks.

Hey there

IM sorry to say but the question is not clear for me, can you show me some example?