Your second routing table (fifth line) sends 10/8 over ppp0. But 10/8 also matches your cell connection 10.60.x.y, so those packets get sent to your VPN instead. You should find whatever part of your VPN setup is advertising 10/8, and make it advertise 10.10/16 instead.

Basically your cell ISP and your VPN are fighting over who owns 10/8. If you can't straighten it out, you might need to change your VPN to use a different RFC1918 range e.g. 172.16/16.

Peter