I purchased a Chinook 9'6X12 tarp and don't understand the location of the grommets. Can someone please explain why they are this way or is this the second defective tarp they have sent me. The first tarp had the holes for grommets punched but no grommets. The second one has some of the grommets in places as shown in drawn attachment. It seems strange how there is not one in the middle but they are offset on opposite sides. I was also confused to find that the tarp is 2 pieces of material sewn together down the middle as opposed to 1 piece of material. Is this right? Also the second tarp I received was folded so the rubber side was together. I had to PEEL it apart almost like the whole thing was glued to itself. Weird. First one wasn't like that. I am wondering if the company ManVenturepost is selling their defects. Or do I just not understand tarps and how they are designed. Thanks and any help is greatly appreciated!