Hi Alex,
I think Paul Sengupta raised a valid point.
Whilst rerunning your tracks, I was surprised to see A/C picked up greater than 240km WOWWWW
What is your antenna setup ?
A highly tuned setup can result in many contacts sent to SkyDemon, and I have shown that in some tests I can cause an overload somewhere in the system - not sure if that is SkyDemon or the networking.
In the release after 20120721, there is a limit to the number of contacts (I think it is set at 32 closest),
I have seen at one point 49 contacts passed to SkyDemon.
thx
Lee