Websites like that are dependent for accuracy on when they load the data. There are several better sources.
The World of Radio mailing list on groups.io often has schedule information. You can also download data from the HFCC, EiBi and others directly from their native websites. There are also apps you can use if you are using a SDR that can utilize this data for tuning. Finally there's the Master List that is updated almost every day. It's produced in Excel format, but it also has a text file that can be utilized in apps like SDRUno. The Master List is a compendium of several different sources.
All of these links, and more, can be found here....
wiki.radioreference.com
In the various Schedules sections....Mike