Filter allows filtering dates different from the configured date filter

Hello @alekas thank you for your report.

Is this behavior normal for this filter?

Yes this module allows you search in all content event if they are in the past, your issue is not related to this module.
You need to add another condition to your views, for example in the upcoming events view should ad Filter criteria the pull only content with date after today and the do the same with Past events.
If you do so and place the filter in your views will give you the right results.