I have no idea why your chapter points are working like you describe. Mine work like you thought yours should work. You must be doing something wrong but I can't figure out what it is.
My E100 probably works different than your EH50 but the process of erasing chapter points must be described in your manual. On my E100, have the HHD selected (not the burner). I press the DISPLAY button on the remote. Then I press the DOWN ARROW to move the yellow highlight down one notch to highlight PLAY. There you should see all the chapter markers that you have placed on your entire HHD. If you have only placed them on the one program then you don't have to locate the ones you want to erase. If you have some that you don't want to erase then you have to highlight one of them and press ENTER and see where that marker takes you. By doing that a few times you can locate the markers you want to erase. Highlight the lowest numbered marker and then press the CANCEL button on the remote which erases that chapter marker. If you have a lot of markers, it doesn't look like you did anything BUT YOU DID. Say you want to erase 6 markers, highlight the lowest numbered one and then press the CANCEL button 6 times.
That's how my E100 works. I hope Panasonic does it the same way on the EH50.
Dave
My E100 probably works different than your EH50 but the process of erasing chapter points must be described in your manual. On my E100, have the HHD selected (not the burner). I press the DISPLAY button on the remote. Then I press the DOWN ARROW to move the yellow highlight down one notch to highlight PLAY. There you should see all the chapter markers that you have placed on your entire HHD. If you have only placed them on the one program then you don't have to locate the ones you want to erase. If you have some that you don't want to erase then you have to highlight one of them and press ENTER and see where that marker takes you. By doing that a few times you can locate the markers you want to erase. Highlight the lowest numbered marker and then press the CANCEL button on the remote which erases that chapter marker. If you have a lot of markers, it doesn't look like you did anything BUT YOU DID. Say you want to erase 6 markers, highlight the lowest numbered one and then press the CANCEL button 6 times.
That's how my E100 works. I hope Panasonic does it the same way on the EH50.
Dave