Strange happenings with dashboards...
I've set up a dashboard that contains only one display: an iFrame with a web page. When I open the test environment and click on the sitemap to open this dashboard, it opens the wrong web page. If I click the same item on the sitemap again - or click refresh in the browser or in the form - the screen redisplays with the correct website. (This first display is a page that I originally was going to use, but have switched to the new one).
vs. 
The site map looks okay:

...as do the app settings (the page that I don't want displayed is turned OFF):

So what am I missing? How can the sitemap point to one page the first time it's clicked and always another page after that??