Both IP’s you listed off are local segments and are not routable over the Internet. An easy way to discover your IP is by visiting http://wimi.com while on your WiFi. This is the IP the mobile app wants. Inside the mobile app, you can navigate to the manage sites page and change the IP from the local one to the outside IP.
Glad everything is working again for you though and hopefully we can get the final step going.
Another thing, your Comcast modem is probably acting as a router. If this is the case and you have another router plugged into the modem you might have a double NAT. This is important since you will have to open ports on both your router and the Comcast modem. This is just one possibility to exclude.