It is hard to tell from your pics, but I will through this out as run into water wick'ing across the waterproof membrane and then leaking in an open hole. And once the water is in, it it trapped in.
See this post of mine. http://www.sunlineclub.com/forums/f7...html#post85057
That is on a slide unit, but the same thing might be happening to you. Water runs down the wall of the camper. When it reaches the bottom of the wall, the water wicks around the sharp 90 deg bottom edge and runs inwards. It will stay stuck to the bottom of the camper until the capillary action tension breaks it free and the water falls to the ground. IF that wicking water finds any hole in the poly membrane it will wick in through the membrane and end up on the other side. (bad news then)
I do not know that this is your issue, but it is worth a look. Do you have any holes in the membrane under the camper at the bottom of the wall? Doing repair like you mentioned may have exposed a hole or 2.
If that is the problem, creating a drip edge on the bottom of the camper to wick "away" the water running down the wall may help. That and sealing up any holes.
Hope this helps. Water sneaking in can be a hard one to find the source sometimes.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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