Do you have administrative access to ISP router?

No, you can't remotely access to your router when you have private IP address on WAN port. Do you have some device from your ISP (modem or router)?

This is private IP address

Ok, your decision, after a few days give me information about your network stability. See you later!

I can't see Local Network or PPPoE addresses? Modem does not normally connect direct to PC. How would you like it connected for the test? You have to create broadband pppoe connection and there enter...

Cross-over between SSID is default behavior of each wireless device It is no true