You really that one C61 working 700' away over RG6? I'm surprised, but I guess as long as it works!
Yea probably due to moca being in the 600 MHz Band.
Yes, I suppose it is only about 5.5 db per hundred feet or around 40 db in the run, plus another 15 db or so from the 8 way splitter. MoCA is output at 0 dbm so that would make it -55 dbm at the client in the man cave. That's below the -45 dbm spec, so it probably doesn't max out the test, but it only needs to deliver 5-10 Mbps for an HD channel.