Dear Rob,
Thanks for pointing this out. We'll make sure to have this feature that when all the right content of the project is set to no, the main project would take all the space available. The new plugin update with this feature automatically set will be launching in a few days.
Meanwhile, you can just add these CSS rules to the Portfolio Manager > Portfolio Manager - Settings > Advanced > Custom CSS tab:
#bop-project-right{
display: none;
}
#bop-project-left{
margin-right: 0;
}
Let me know if you have any other queries.