Jack, did you update the driver for Win 8.1? http://www.tp-link.com/en/support/download/?model=TL-WDN4800&version=V1#tbl_a

There is no nternet access when plugged direct to incioming split phone line (broadband). Is that normal ? Normal. The port plugged in phone line is RJ11 port, while port on WR702N is RJ45 port. If...

You should put in IP address of the PS3 which you are trying to open ports for. http://www.tp-link.com/en/article/?faqid=72

Difficult to give you any recommendation based on what you said.

Yes, you did. I'm sorry... Umm, it is so strange...Except streaming issue, is the router working OK? Any abnormal in the system log at that time?

Https websites such as facebook cannot be blocked by the router...