@johnpoz
Pardon me for making you confused on my problem. I'd try my best to explain in future regarding my problem, please do accept my sincere apologies.
@asterix ,@johnpoz and all
Actually my assigned tunnel (not the Routed /64 or /48) address is 2001:470:35:bd::1 and ::2 (server and client address). Referring to my post #1, i can surf ipv6 websites using the 2001:470:35:bd::XXXX without any problem but i can't figure out how to use my 2001:470:36:bd: address nor the Routed /48 .
After fiddling much and head-banging on the desk, i've managed to figure it out as per outlined below :
1. Follow the guide using http://doc.pfsense.org/index.php/Using_IPv6_on_2.0
2. Stop at step no 7 http://doc.pfsense.org/index.php/Using_IPv6_on_2.0#Setup_LAN_for_IPv6 . READ throughly and READ IT AGAIN. It says you need to get the Routed IPv6 /64 Address which is in my case is 2001:470:36:bd: NOT the 2001:470:35:bd: .
Of course this is where i assign my LAN interface with 2001:470:35:bd and the whole DHCPv6 Server range to my client. It works, but not the expected result in the end. And also this is where my mistakes whereby i've misread the guide, pardon me again, my bad.
I hope my case can help somebody out there if they every stumble upon such thing. And also, i've managed to get my rDNS working and "bind it" to my domain name. So to the newbies, pfsense team has made a very comprehensive guide and it's a good one, do read it and this time if you ever come across any problem, read and read it again because somewhere along the lines lies the answer to your question.
Thank you pfsense team, dev and moderator! thanks to all especially databeestje, johnpoz, asterix and trmentry you guys rocks!