Unexpected problems setting up / Still highly recommended

We have an additional repeater required. So far we had a Edimax Repeater. The user interface is not as convincing and therefore we have chosen for the Asus repeater. The setup process is straightforward and worked perfectly. With little effort, the repeater was set up. Since we use the MAC filter, I have this then set the router for the Asus repeater. Thus, the problems went. The MAC address is printed on the repeater, this is registered and then went nothing more. So MAC filter activated again and it went. Then in the ASUS User Interface displays the MAC address with the balanced and established recognized in router that everything was recorded correctly. Reactivated the MAC filter and nothing was more. Then found that there is a newer firmware. This installed, but still no solution of the problem. Eventually I then logged in the repeater in manual mode on the router. The MAC filter was enabled and the repeater could not connect. Then I announced the Repeater that I should not hesitate to check the MAC address and showed this also equal to. I then been amazed that this end had a different number than the printed on the repeater and displayed on the home page of the Asus interface MAC address. After correction of the address in the router running and everything runs smoothly. Basically recommended.