Jadewyn,
You said that you "went back to LW to see what port numbers were defaulted in options and entered "6346" and "48403"... LW's listening port & connection port should be the same number.You should also have that same port number allowed within your software firewall. Just one port number.

Also, when you forward a port for FW, use a different port to the one you've forwarded for LW.
(the person in the FW thread's talking about enabling UPnP, I have no idea about that... I just went straight to port forwarding)

Sorry if I've read your post wrong & got you confused