multiple akrutosync installations behind one router/firewall

I have for years run two akrutosync installations behind a single router (I purchased licenses for both). The second pc has the following lines added in config.txt
port.configuration.external=7070
port.ssl=1443
and everything worked fine. Recently I noticed both have to begun to encounter problems.
Is it no longer allowable to do this?
On one I cant add contacts from the phone (but I can modify existing contacts). On the other I cant setup the exchange active sync account when I reconfigure the phone.
I also noticed there are several web references to requiring port 80 which I have never before had in the firewall rules (both use sync over the internet)