Well I hate to have to update this thread but I suppose it's time. We were camping this weekend and a big rainstorm blew through. I noticed the puddle again on the floor. I also noticed that the trim along the wall was now wavy and wrinkled. I poked at the trim and it popped off very easily and that's when I saw the problem. Water is leaking in all along the bottom of the wall.
Here are updated pics taken this weekend, now almost a year later from the original post. My TT has a one year warranty which of course ran out a couple months ago. I brought it into the dealer I purchased it from when towing back this afternoon. I also contacted Crossroads explaining the problem and noting that I noticed a puddle months ago but didn't think it was something serious until now.
I don't suspect they'll cover it under the warranty, unfortunately :(
If you look closely in this first pic you can see the water beads along the wall with the trim off.
In this next pic you can see the new puddle and how wavy the trim has gotten.