pppoe with bridge

Hi

I have a couple of small relay links that need to be setup.
I would like to bridge these relay points with the next main site and run pppoe on it.

RB433 bridged Relay
0 X name=“bridge” mtu=1500 arp=enabled mac-address=00:0C:42:0C:BE:EB protocol-mode=none priority=0x8000 auto-mac=yes admin-mac=00:00:00:00:00:00 max-message-age=20s
forward-delay=15s transmit-hold-count=6 ageing-time=5m

INTERFACE BRIDGE PRIORITY PATH-COST HORIZON

0 I clients_ap bridge 0x80 10 none
1 I bb->main_site bridge 0x80 10 none

0 R ;;; bb->main_site
name=“bb->main_site” mtu=1500 mac-address=00:0C:42:0C:BE:EB arp=enabled interface-type=Atheros AR5413 mode=station-pseudobridge ssid=“bb-main_site” frequency=5180 band=5ghz scan-list=default
antenna-mode=ant-a wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=no security-profile=default compression=no

1 R ;;; clients ap
name=“clients_ap” mtu=1500 mac-address=00:0B:6B:86:C5:48 arp=enabled interface-type=Atheros AR5213 mode=ap-bridge ssid=“STM” frequency=5745 band=5ghz scan-list=default
antenna-mode=ant-a wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no default-authentication=no default-forwarding=no default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=yes security-profile=default compression=no

Now the clients will authenticate on the main site but will have the same mac address which is the bridged interface . The only problem is when there is more than one client connecting, they both have the same mac address and one client will drop and the other stays active.

I am not sure if the duplicate mac address has anything to do with the problem. I am also using Radius Manager.

Is this possible or is my config wrong ?

Thanks

sorted , needed to use wds instead.