Go to the URL at the top of your page and change the ebay.ca to ebay.com.
That will take you to the US pages.
It sounds as if you have accidentally set eBayCanada as your default.
Go to Google and ask for eBay.com.
Click on that and then bookmark the page.
Now go to your Bookmarks list and remove the eBay,CA bookmark.
If I have guided you correctly, and I am a technodolt, you should now go to eBaydotCOM when you hit the bookmark.
Good luck and drop in anytime to chat. There's beer in the fridge.