wlan1 Interface running as "slave"

Hello,

wlan1 is running as “slave” the impact of this seems to be that it ignores the routers DCHP server and the subnet with all my wired devices (192.168.88.x) and puts wireless devices on the ISP router’s subnet (192.168.1.x). I have attached a screencap of my settings.

I factory reset my router and installed the latest update but this is still happening.

How can I fix this?

Thanks for any help!