30Mbps on Premier - DOCSIS 2 plan code?

Hi,

I'm posting this here because it appears that the forum moderators have an easier time fixing this sort of problem than phone support. I recently signed up for a new Cox HSI Premier account and purchased and installed a Motorola SB6121 DOCSIS 3 modem. Various speed tests that I am doing are tending to top out at almost exactly 30Mbps, which makes me think I likely have the problem I have seen referred to on here where a line with a DOCSIS 3 modem is provisioned for DOCSIS 2. Based upon my casual understanding, it looks like the signal levels indicated by the modem are tolerable and there is nothing to suggest that a bad link is to blame.

If someone could have a look at my account or point me in the right direction I would appreciate it.