hey guys, after staying in the tent for a total of 14 nites, I still cannot figure out what this flap is for? its location between the rainfly straps means it can only be deployed with the rainfly, tho it can be rolled and secured with its own 'emergency-orange?' velcro while the rainfly is used. the only thing I can see is you can roll the rainfly in it but whats the use of that? I am stumped!! its only on the rear doorway of the airtop. FYI the issue I thought I had when the tent arrived last fall, with the apparent lack of a continuous seal, after being on the jeep all winter, no leaks! I am very pleased with the tent, altho the mattress is too hard and I am looking to maybe add memory foam or replace it completely. thanks for any help with this funky flap dilemma, George