AT&T, and most other major telecoms, generally have terrible peering, so, you may often see a lot of packet loss and weird routes to some destinations, especially if you aren't paying for "premium traffic" at your VPN site. (If you want good peering, go with someone like »
sonic.net/fusion/, it might even get you faster speeds, save some money and time from having to do yearly "contract re-negotiations".)
What's your traceroutes?
Also, it's "VRAD", not "VRAM".