If that's normal, then it's a Jeep thing. I've had windshields replaced on BMW's, Chevy's and Land Rover's and they've ALWAYS been sealed around the entire windshield. I'd call the windshield company that you had replace it and ask them for confirmation. If they claim that's normal, ask them to send you it in writing and see if their response changes.
EDIT: You can test it yourself with a little bit of water and see if it goes through.
Not sure if this pic will help or not, but here ya go... http://img16.imageshack.us/img16/2158/13225896.jpg