Toilets, Sinks, Showers, Tubs and Disposals - Leaky Shower Door

We inherited a walk-in shower from the previous owners. I've discovered that when the door is closed, there is a nice size gap between the door bottom and shower. The door is not flush, which means the drain track on the bottom of the door is not flush either. When the shower door gets opened, water drains from the door onto the floor. I've been playing around with adjusting the axel position, but without much luck. The top of the door frame is *almost* level... which I think is also contributing to the gap.

So, I'm at a loss. Am I right in thinking I need to simply adjust the axel position? Do I need to replace the door entirely?

There is no distinguishing marks/logos on the shower insert or door. The only think I can find is ELM on the drain cover, but that could also be after market. Is there a good resource online that would help me identify the manufacturer of our shower?

I appreciate any help or advice that can be offered.

Usually there is a drip baffle attached to the inside of the door at a slight angle from the latch side down to the hinge side. When water runs down the door it falls in the shower. When you open the door the excess will fall back into the shower due to the angle in which it was installed. Check with the big box stores or at a plumbing supply house to see if they offer it. I imagine it is a generic commodity, and not brand specific.