It is intentionally so!
When the viewer "surf-in," they get one banner only, random, or so it seems to them!
An easily work around to the trouble, is to login, and to "my rings", and to "view web sites"....
Click "#u ..... edit URL settings" in the web site that difficulties occur.
insert a tick in the bar
"Show the navbar of the Ring being surfed first."
insert "2" in the bar
"Show 2 navbars on my website only when the full stack is not shown"
"change selected fields."
then you will get the required effect!!!