You should be able to get into a list of timer recordings by this method:
1 Open “Initial Setup” menu
Press the SETUP button or the TIMER button while the DVD is in
Stop or Play mode.
2 Select “PROG”
Use the ??/?? buttons to highlight “PROG” then press the
ENTER button.
3 Select the recording to be deleted
Use the ?? and ??/?? buttons.
Press the ?? button to move to the next setting.

The squares are the arrow keys! You should be able to delete the settings using these keys or some other key.
Next time you set a timer recording make certain you don't set the weekly setting!