WAX610 - Multiple WAP + DHCP issues

Hello, 

For our small business, I am using 3 WAX610 - with same SSID and fast roaming enabled. 

My topology is 

1. ISP Modem/Gateway (Hitron)

 connected to a

2. TPLink unmanaged POE Switch

connected to 3 

3. WAX610 Access Points 

The ISP modem is the gateway and has DHCP enabled, DHCP scope (192.168.0.10-200). 

I have the access points in Bridge Mode.

I set the WAPs to static IP (192.168.0.3, 4 and 5), connected them to the TPlink switch and I can see them on insight app as connected and green.

Problem:

while some clients get the correct IP address from the DHCP scope and can connect to the internet. I noticed new clients are receiving an IP from the 192.168.1.XX range, so obviously even thought they are successfully authenticated, they cannot connect to the internet.

All 3 access points are a part of the insight portal, so the SSID settings are the same.

are there any settings I need to change or how I troubleshoot so all clients get an IP address from the correct range ie., 192.168.0.XX  and not 192.168.1.XX.

Any direction is appreciated.

I already replaced the TPLink switch with a brand new one, unmanaged also. That did not seem to help.