Yeah, most AP's don't support DHCP, they are meant to extend a network.
I didn't see that in the specs either.
I'm sure you know what DHCP does, but in case you don't: It is one of the core services that allows multiple devices to sit in a private LAN. Specifically, it handles the IP address assignment in a private 10.x/172.16.x/192.168.x IP address range. If your devices don't use a DHCP server, your router will be able to pass traffic to a single device but after that, the other devices won't receive or pass LAN or WAN traffic.
A SOHO wireless router (SOHO = small office/home office) is what you need. The Tenda is an AP but not a router.