URL of tab stripping panel path

I have a panel set up

• single column
• path set to 'user/%' to appear as the user profile
• default panel style set to 'tabs'
• two panes added, each an established mini-panel: "About Me" and "My Posts"

Everything appears as desired at (for example) mysite.com/user/glottus (I see the "About Me" and "My posts" tabs that I want), but the tabs have URLs of :
mysite.com/#tabs-user-profile-userprofile-1
mysite.com/#tabs-user-profile-userprofile-2

They SHOULD be:
mysite.com/user/glottus#tabs-user-profile-userprofile-1
mysite.com/user/glottus#tabs-user-profile-userprofile-2

When clicking on the second tab, I see what I expect for a moment, but then get redirected to the site's main page. Only manually adjusting the URL to be mysite.com/user/glottus/#tabs-user-profile-userprofile-2 gets me a stable look at what I expected.

Also, I discovered that by hitting my browser's "Back" button (after the redirection), I can see the second tab/mini-panel content without bouncing to the main page again, even though the path appears to be mysite.com/#tabs-user-profile-userprofile-2.

I can't figure out how to get each of the tabs to keep the 'user/username' portion of the URL.

What am I missing here?