Problems with site tvspielfilm.de

Hi,

I'm using the following setup: WG++ 3.3.0.0, Windows 8.1.
After switching to a new siteini because of the changed import of the provider, the guide.xml suddenly does not contain all program data as it is displayed on the homepage of the provider itself. Programs last several hours in the imported XML, mostly over midnight, instead of less than an hour as it would be correct. The subsequent broadcasts are completely missing and it is not until the night that the program is displayed correctly again.
An example is the program "Galileo" on the channel "ProSieben" from today (July 25) to Thursday (July 27), which according to tvspielfilm.de homepage should run from 19:05 to 20:10, but in the Guide.xml it lasts from 19:05 to 05:00 or 05:10 on the following day.
Does anyone have an idea what could lead to this strange behavior?

Thanks
dfjk1