About a thumbnail and breadcrumbs

Hi,
I have 2 issues:

1. Why it’s vice versa when in the tour type I mark don’t show breadcrumb still it shows, and when I unmark the box it shows on the front end the breadcrumb? maybe that’s a bug too to fix vice versa that recognises the system?
2. And I would like to know where is shown the thumbnail when adding an image in the tour type part? when I put an image it doesn’t show anywhere at all.