Would you be able to draw simply topology scheme with LAN/WAN IP addresses of both your RUT950 devices and W10/W7 devices and share it with me? (it might be the case there there is IP conflict in the solution preventing from establishing VPNs)
To better understanding your RUT950 configuration, download troubleshoot package from router's "System -> Administration -> Troubleshoot" menu. If you are generating troubleshoot package through CLI with "troubleshoot.sh" command, then you can connect to router via SCP protocol and download generated troubleshoot package manually, which will be stored in "/tmp" directory.
Seeing W10/W7's IPsec and L2TP configurations would also be helpful in trying to resolve connection issue. Would you be able to make screenshots of W10/W7's configuration?
You can send this files (topology, troubleshoot package, configuration screenshots) to me via private message.