Sort of have me stumped.
I am assuming that the liquid runs down the door liner and then spills onto the floor instead of into the tub. You may want to check that this is what is happening.
If you look at the inner door liner Item 807 in Section 2 it looks like there is a peice that is angled back to towards the outside of the door at the bottom. Though it is not shown as a separate item perhaps this is missing or broken.
I would go to an appliance store and check out a unit in the store to see if there are any differences between a new unit and yours.
A digital camera may come in handy here as you can take pictures of yours and have them as a reference.