In Notes of TL-MR3220_V2_140929, it says " Fix the bug that the backup link won't revert to the main link when the main connection resumes to normal again;"....

What's the link speed of wireless network connection showing on your laptop? Try channel width 40MHz.

When you open it with IE 11, what's the error message? Can you post a screenshot pls? We can use any web browser to set it up. Do you finish the set up on firefox or chrome to see if the extender...

As I know, this problem has been fixed. What's the model number? How about hardware version and firmware version of it?

Try DMZ or open ports for PS3.

I'm not sure if they can work together. You should tell some info about your ISP or requirements for internet connection...or contact your ISP to confirm if they can work together as you know that...