Why my mktik is getting two IPs?

I’m trying to make a LAN so people in my condo can acess internet via HotSpot but we having two main problems here.

First: my RB951, when in AP mode, is still getting a LAN IP instead the internet one, but the gateway is correct.
Not sure what happens, but when this happens, I’m not able to reach the internet (although everything runs ok in my LAN).

Second: Once I gave a static IP on the LAN to the mikrotik, it assumes a second IP from the LAN anyway, even if every DHCP function is deactivaded on my modem (which is on bridge mode, so the mktik can dial PPPoE and router).

What am I missing?

Tks!

Seems that your WAN interface is bridged with LAN ports and it’s DHCP client is getting offer from your local DHCP server.

Got it. Any hints about how to do it right?

Menu Bridge, tab Ports. Look for WAN interface and remove it from bridge it is assigned to.
If WAN is master-port then you need to check all interfaces in Interfaces menu for “Master port” set to WAN interface in “General tab” or check WAN interface if it has any “Master port” set.