Yes, my network is exactly as you described. Also, my laptop won't connect to internet anymore. But, I might be doing something wrong so I'll describe what I did:
First tried to share network, didn't work, gave the IP error from my first post.
I then tried network bridge, firstly by connecting to Xbox and then connecting my only LAN and my wireless, with no firewall. I then waited a bit and restarted my Xbox, still IP doesn't work. But now my computer isn't even connecting to my internet, so no idea. Is there any way to make shared network work? It seems easier than bridging.
And my current DCHP setting is: 192.168.0.100 to 192.168.0.199
so I don't know if it conflicts with the IP, so should I still do it?