It is probably just me but I will try and detail what I am doing.

I start the application and select favourites/BBC1

I tap on a program and press the info button to open the program detail window to see if it interests me. If it doesn't I press the back button to return to the main listings page.

I select a program I want to be reminded of and press the reminder button.

Now when I check my calendar both programs are displayed.

The only way I have found to stop this is to delete the info in the program detail window before pressing the back button. This only works if I have not already selected any programs. I also understand you can deselect a program by tapping it a second time but without a visual notification this can be hit and miss. The only fool proof way to select multiple programs is not to click the info button,

edit; I have found out that if I use the down arrow to scroll through programmes then click the info button they are not selected.