Leaking outside storage compartment

Had that issue myself and my access door isn't adjustable. I did the light trick and I could see the bulb seal wasn't contacting the inner lip of the compartment at the top ans was allowing rainwater in.

What I did was, I took a wooden mallet and carefully bent the inner compartment lip outward (where the bulb seal wasn't contacting it.) Took a couple 'adjustments' with the mallet and light checks but I got it handled and it don't leak now.

I had a similar problem with a previous trailer, except it wasn't wet inside the compartment. Water ran out the bottom of the door itself. I never could figure that one out completely. Somehow, rain would seep into the inside of the door, flow to the bottom, and then when the door was lifted, would leak out the seam in the middle where the outer band met.

Perhaps yours is not leaking around the seals, but is leaking through the door itself. It's seeping in at the top of the door, flowing through the inside of the door, and found a way of escape, not on the outside, or through a weep hole in the bottom of the door, but actually inside the camper storage area. If the rubber seals around your door are sealed (The light test, as stated above, is a good way to check), then it's coming through the door itself. (or down the wall?????... roof leak?....)

Put a bright light behind it when it's dark outside. That will show you where the seal isn't tight enough.
Probably just need to tighten the latch by bending it slightly.