Hi Spudler,
Were you bonding 32 channels and then aggregating it in with another 32 channels for a combined 64? I can't think of any other way to actually arrive at 2Gbit down. Just the other day I was testing Arris hardware across 32 channel bonded symmetrical transmit/receive, but the only tests which depicted the actual connection speeds I was setup for were the upload tests here showing 1.3Gbit out of a potential 1.44Gbit.