At a loss

Im at a loss here and need some help on which way to go about this now, I have tried to bridge but does not seem to work the way I want here is what I am trying to achieve using a RB750

Port 1 Wireless WAN has a dhcp server from the main office
Port 2 LAN
Port 3 Bridged with port 4 for TV in building
Port 4 Bridged Local IPTV provider with DHCP server at main office
Port 5 Bridged with Port 3,4 for Access point to shoot to another building for tv and I need to get internet to this building off port 1’s WAN

I have tried to Bridge all the Ports together doesn’t help since the 2 dhcp’s fight each other and lock everything up either have tv or internet.
Any thoughts? if you guys need a print out of the RB just let me know.

Sounds like a VLAN trunk is in order. Assign IPTV to one VLAN WAN to the other. Make your port 5 a trunk.