Atm, this is the only issue with my site. Changing the SEF engine isn't the solution as new problems may arise.

Titus said:
You can change to artio joomsef, if you can, that will fix some issues.

After implementing the codes suggested, all tabs seems to be creating the correct URLs except the first one. If you click the second tab followed by click the first one again, it will add Page-1 to the end of the URL. How do I avoid that?

Any one from JoomlaWorks?