Pretty silly that you can't register for WL if you have unclaimed WL rewards, especially considering you get WL points as a Rivals reward and the rewards for both are released basically within an hour of each other.
The 240 points I got from DR got me to 2000 and I was looking forward to registering for this weekend then claiming my WL rewards and using them to register for next week. There was no option to register on the in-game menu and when I selected the only WL option I had to claim my rewards and couldn't back out of it.
This makes part of the rewards for playing 30 games in three days redundant and reduces player engagement. I was looking forward to playing some WL this weekend but now I won't. I won't get time to play enough games to automatically quality for next week, when I will have all kinds of free time. It sucks because I earned enough points to qualify for both but didn't get to use them.