water getting into back porch soffits so much they are bowing with water

I have a standard double-wide home with a built-on back porch. When the metal roof was laid the contractor simply took the metal roof from the house and overlapped it with the metal roof from the porch (approx 3 inch overlap). Now when it rains, the water is somehow getting under the metal porch roof and running into the soffit that I have on the porch to the point that the soffit has so much water in it that it's about to bow under with the weight. I am not sure whether they have installed the roof correctly with the proper pieces. I went up and took several photos that I hope will help. Thanks so much