Points are doubling all of a sudden

Verify that in the Schedule (Setup > League > Schedule) that in the column next to the date, that it reads Normal Points. The Type of Week uses the drop down arrow to select something other than normal bowling.

By using the drop down arrow in the Points Awarded column, there are other options available, such as 'No Points' for a play-off or fun night.

Also, verify that the points are correct in your league rules.