Re: Update
I never did get an answer from Mr. Walczak...even sent him a PM. So, I am assuming door side slide windows do not have weep holes and it is OK to caulk the vertical edges of the windows (just finished doing that)
By the way...I did talk with certified Heartland Tech, Ryan Prough, and his opinion was since I don't have an actual leak and the windows are "rain tested" at the factory and dealer, I don't need to pull the window and reinstall. Hope he is right! It would be nice to have a little more information about the "internal seal" though! I sure don't want any delamination problems down the road!
Happy Camping!