Hi all, I have a framed shower door as pictured and it’s sagging. The bottom doesn’t close properly unless I lift and give it a push, but the door is quite heavy and I don’t want have to do that all the time. After watching YouTube videos and threads posted here I decided to adjust it myself. However, once I unscrewed the two screws and slid the door to an ideal position, I realised the screws couldn’t secure the slider/hinge, a closer look revealed that there were 3 drill holes on the track as pictured, so unless the screws go into those holes they would do nothing to secure the door, but that means the door would be back in the incorrect position.


My questions: is this normal to have these holes on the sliding track with this type of shower screen door, or is it likely that the previous owner did this?
Can I still fix it myself or do I have to get somebody in? And if I need somebody to do the adjustment who would I be contacting? A handyman? My plumber has already said he can’t help.
Thanks so much for any help!