Gigablast Poor Download Speeds

I upgraded to Cox Gigablast a couple of weeks ago and have not yet been able achieve download speeds greater than 200mbps-250mbps. Upload speeds are fine at 35mbps. I have tried modem reboots and factory resets, and even a reactivation today. Nothing seems to get the speeds up. The modem is connected directly to the main cable drop, no splitters. The Modem is an Arris SB8200. 

While all of 32 channels are locked, the first 20 are locked close to the Downstream 957MHz from Cox  while the last 12 are all locked at frequencies about half of 957MHz. Is that part of the problem? I feel like that would reduce the capability of the downstream channels. Sorry if a dumb question.

Thanks in advance for any assistance.

Here is current status of the Downstream Bonded Channels. The OFDM channel is #159 at only 348Mhz:

Channel ID	Lock Status	Modulation	Frequency	Power	SNR/MER	Corrected	Uncorrectables
30	Locked	QAM256	957000000 Hz	9.6 dBmV	40.2 dB	0	0
1	Locked	QAM256	783000000 Hz	9.0 dBmV	40.6 dB	0	0
2	Locked	QAM256	789000000 Hz	8.9 dBmV	40.7 dB	0	0
3	Locked	QAM256	795000000 Hz	8.9 dBmV	40.6 dB	0	0
4	Locked	QAM256	801000000 Hz	9.0 dBmV	40.5 dB	0	0
9	Locked	QAM256	831000000 Hz	9.2 dBmV	40.2 dB	0	0
10	Locked	QAM256	837000000 Hz	9.1 dBmV	40.5 dB	0	0
11	Locked	QAM256	843000000 Hz	9.2 dBmV	40.2 dB	0	0
12	Locked	QAM256	849000000 Hz	9.4 dBmV	40.1 dB	0	0
17	Locked	QAM256	879000000 Hz	9.2 dBmV	40.0 dB	0	0
18	Locked	QAM256	885000000 Hz	9.0 dBmV	39.8 dB	0	0
19	Locked	QAM256	891000000 Hz	9.1 dBmV	40.1 dB	0	0
20	Locked	QAM256	897000000 Hz	9.2 dBmV	39.8 dB	0	0
21	Locked	QAM256	903000000 Hz	9.2 dBmV	39.8 dB	0	0
22	Locked	QAM256	909000000 Hz	9.2 dBmV	39.9 dB	0	0
25	Locked	QAM256	927000000 Hz	9.6 dBmV	39.6 dB	0	0
26	Locked	QAM256	933000000 Hz	9.4 dBmV	40.2 dB	0	0
27	Locked	QAM256	939000000 Hz	9.7 dBmV	40.2 dB	0	0
28	Locked	QAM256	945000000 Hz	9.7 dBmV	40.0 dB	0	0
29	Locked	QAM256	951000000 Hz	9.6 dBmV	40.0 dB	0	0
33	Locked	QAM256	405000000 Hz	6.8 dBmV	40.9 dB	0	0
34	Locked	QAM256	411000000 Hz	6.8 dBmV	41.0 dB	0	0
35	Locked	QAM256	417000000 Hz	6.7 dBmV	40.9 dB	0	0
36	Locked	QAM256	423000000 Hz	7.1 dBmV	41.2 dB	0	0
37	Locked	QAM256	429000000 Hz	7.2 dBmV	41.1 dB	0	0
38	Locked	QAM256	435000000 Hz	7.2 dBmV	41.1 dB	0	0
41	Locked	QAM256	453000000 Hz	7.6 dBmV	41.0 dB	0	0
42	Locked	QAM256	459000000 Hz	7.6 dBmV	41.1 dB	0	0
43	Locked	QAM256	465000000 Hz	7.7 dBmV	41.1 dB	0	0
44	Locked	QAM256	471000000 Hz	7.9 dBmV	41.4 dB	0	0
45	Locked	QAM256	477000000 Hz	7.9 dBmV	41.5 dB	0	0
46	Locked	QAM256	483000000 Hz	7.7 dBmV	41.2 dB	0	0
159	Locked	Other	348000000 Hz	9.3 dBmV	41.8 dB	98439200	0