Modem system uptime resets 3 times a day; Lose connection. Support no help

For the last 4 months our modem, w/ 13 static ips, loses connection intermittantly 1-3 times a day at random intervals. It takes around 3 - 4 minutes for the modem to resync itself. The physical cable is only 8 months old, connections are good and have all ends are new. When this occurs the system uptime resets itself and I see this entry in the modem logs:

[Dhcpc][1478]: erouter0 got new IP 50.131.*.176 2016/8/6 13:11:59 Notice

This IP being called out is not one of our static ips and is not even in our range. Our WAN static ip's start with 50.193.*.* our WAN default gateway is in the range of the entry in the logs 50.131.*.1. Our static ip's were brought over from another area when we moved to this location. I'm also not sure but this log entry looks like their system is trying to hand our modem a DHCP address ending in .175? I can access our modem gateway page by either using 10.1.10.1 or this .175 address or the last ip in my static 50.193.*.* range. 3 Different ips to one location. That is weird right? 

Comcast support has been zero help. They've sent out multiple techs that have changed the modems to different brands and models and they insist the signal is fine(I'll post our signals further down but I believe they are fine too). I'm not really sure what else to do. Security says we are not being Dos'd and this drop occurs even if we if we completely disconnect our LAN from the modem. When I log back in I can see that the system uptime has reset itself. I've experienced this issue with no network traffic, medium network traffic and heavy network traffic. Doesn't seem to make a difference. I've also plugged a solo laptop into the modem and left it on doing nothing and the modem has dropped. One level 2 tech last week told me there were confirmed issues on the node in our area that correlate with our drop times. I asked him to add the notes to the ticket, which he did and was confirmed last week with another tech that he had added them. When I called today they were mysteriously gone.

I spoke to a supervisor today that tried to tell me our janitorial service might be unplugging the modem. COME ON! My janitorial service is not working at 3am! I've tried 3 different electrical circuits and 3 different UPS battery backups. It is not a power issue or something in our server closet would also have a reset issue. We're running multiple servers and cisco equipment.

Not really sure what to do. Comcast is blaming me. They don't seem to care about "System Uptime" as long as the signal is good. Here's some other relevent info from my modem configs.

Bridge Mode is disabled. My Cisco router handles the static routes.

System Hardware

Firewall Security set to Low

From the WAN Page: