If I use and Meta Alias ​​is "busted" the front end

I can not see why the site is in testing, but the screenshot makes the idea, this is how you see when sef advance is active

and this is without sef advance active

That's Itemid issue: www.sakic.net/support/faq/sef_advance/#19

because only a few items, others work perfectly

The problem is only in the url that I made the Alias ​​& Meta and if I disable the rewrite everything works perfectly, is a bug?