Site not found error??

[Mommychickadee]

This weird thing keeps happening to me. When I type "amblesideonline.org" into my browser address window, it doesn't load properly the first time. For some reason, an extra "/" with five randomized capital letters get added onto the URL, and a message appears saying "Site not found" showing the wrong HTML address (with the added part).  If I re-type "amblesideonline.org" into the address window, it pops up the site like usual, but I always have to enter it in a second time! This just started maybe a week or two ago? I use Google, and I haven't tried it on a different browser, but I was wondering if I'm the only one this is happening to?