to get the water to flow into the drain appropriately you'll need to set up some compound pitches with your finished patio. Think of taking a sheet of rubber and pulling down with your thumb on the middle of an edge. That's adventure club territory. It would be a heck of a lot easier to do the whole patio as a flat plane, pitched to one side. Am I reading correctly that you can do this pitched towards the fence (away from where you stood to take the pic)?

Thanks! As for the water situation, I am the second-to-last apartment. There are 10 to the left of me as you look at the picture of the patio itself. The water from the building's first downspout actually runs away from the building, which starts the 'river' that's 5 feet out from the edge of the patio. I think water runs down from the hill where the trees are as well, merging to make the river even worse. Some water must run along the building, and about 3/4 of the water that comes out of my downspout actually goes directly into the river that encroaches on my patio. You can see in the picture where the previous tenant thought to put brick down to divert the river. Didn't work! The land behind my apartment actually slopes slightly downward to the right as you look at the patio. Being one of the last in the row, I get the water from almost the entire length of the building! I may just leave the back dirt as it is and focus more on making the patio itself more enjoyable with a container garden. I'm thinking of putting two planters parallel to the house on the border of the patio. I'm thinking the kind that are up on stands about two-three feet off the ground. Or, I was considering buying two small sections of an iron gate from Lowes and putting them in the same place, but with window-box type planters. Basically, I would create a balcony for myself instead of a patio, leaving a small area between the two sections of gate to walk through in the center...

We put down a paver patio where our walkout basement slider is. There is a deck above so that area was always wet and muddy. Our landscaper put a simple French drain under the patio that comes out further in our yard. We have a very large lot. No issues with the pavers or wetness. Make sure your landscaper uses the proper procedure when he applies the polymeric sand or that will wash away sooner than it should and will need to be redone. Easy DIY job when that time comes.

No idea the water source based on photos. A paver patio is built on granular material that drains quite well. so there is no need for a drain under it. Even if the material under it becomes saturated, the patio surface will still shed water, and eventually the saturated material will still drain. The rocks around the edge I would not call a retaining "wall." They act more as a curb. But since the curb is comprised only of individual rocks separated by soil, it, in itself, is not capable of preventing water from draining away. Nor should it be. The existence of the patio & curb seems separate from the problem of an unknown source of water infiltrating an area. (Other than that they could complicate the diagnosis and repair.) But it is enough water to look like a leak ... unless you happen to have a very high water table. If you do and there has been a lot of rain in days prior, that could cause such a condition.