First, you should make sure that you are using the subscribed nick you want to check.
It seems very obvious, but the most typical error in this cases is that players are using a different nick.
After checking this, if you think there is an error in your subscription expiration date, you can check the movements of Your Ludo+ subscription to solve your doubt. You can find it in Your account and click on the View movements link of the Ludo+ Subscription section
If you still see that the error persists, a common problem is that your computer's clock is not correctly set with the current date, so that it shows a wrong calculated date.