ISSUE SUMMARY:
Look at what happens when a group member is logged in compared to when NOT logged in.

This is from my localhost developer site but the same thing happened when I tried it on the live site. I think a test should be done on a different site.

Hi,

please put this CSS as site template custom CSS

#joms-group--members .joms-list__item {
  display: inline-block;
  float: inherit;
  margin-bottom: 10px;
  width: 19%;
}

Thanks! That solved the problem.