Ok, just making sure about the 6580. I presume TW is the only ISP in your area? I think I would find a more open ISP if it were me.
You might want to hold on to it for a bit to see how your ISP options goes. Unless you can find someone to trade it for a SB 6121, 6141 or 6180.
Hmm, Ya, RE means refurb so it's not new. Any return to Amazon available? I think I'm going to recommend you either return it and go with something NEW thats not a refurb. All these little problems are not what is seen on my 655 and presume others. I don't think this unit has been actually refurbished by DLink. Probably just basic testing by someone whom sold it to you and called it RE maybe. If you can't return it, I would get on the phone to DLink and ask them if they can do a REAL RMA for it. Tell them what we've done.
IF you can return it to Amazon, I would recommend either finding a 655 that is
new else where or if you can't find a NEW 655, I would recommend trying a DIR-645 or 657 if your only looking for 2.4Ghz WiFi. If your considering 5Ghz as well, then please review the DIR-857, 827, 826L, 825, or 835 routers for this. I would recommend the DIR-865L however it maybe have additional features that you may or may not need at this time. I managed to get one on sale on Cyber Monday.
Let us know how it goes.