Solved

New league

Joined a new league say only 1  race per day,  but the race is more than 24 hours away. 

It may be because the new season has just begun. After every season, there is a 1 day break where there isn't a race. 

It making miss an day, start on  the 2nd race.

It's because you can't enter in 2 races within 24 hours. Your last league raced at 19.30 and your new league races at 18.30 that makes 2 races within 24 hours since you are not allowed to do that to miss 1 race and you will be able to race in next race in your new league!