2011 Hornet Front slide Leak

[mrdegold1]

Hi All
We have a 2011 Hornet Platinum 31rbds we purchase new.
We had taken it out several times in 2012 however this is our first trip out in 2013. The trailer was setup level left to right and front to back as well. We went out last night and while out it started raining very hard. when we arrived back at the rig we found that the front slide was leaking from the front molding and the cabinet as well. I went up and looked at the slide from the outside top and the rubber gasket was flat against the roof and the slide was fully open.
This is not the first really heavy rain that we have been setup and camping during
The way we got the leaking to stop was to pull the slide in a few inches which slowed the dripping and pretty quickly stopped completely. It rain hard again overnight and we did not notice an additional leaking.
Our sofa is wet as well as our dining area and the carpet in that area. Some of the molding near the floor seems to be damage as well.
I have a few questions.
What could have cause this to happen?
What can I do to prevent this from happening again?
What can we do to clean the water and water stains?
Would this be a warranty claim.?
Would this be covered under insurance?

Thanks for the help
Michael