Helman Group CCP-510 Circus Cart Popcorn Maker

Where Do I start. How about no assemble instructions. After studying the picture on the box I got it together. Albeit with an extra cross member and missing the two leveler bolts. I put it in place, loaded it up, turned it on. The popcorn started to pop. A kernel popped the lid open and unpopped kernels started to fly all over the inside of the machine. See the flapper lids are too light. I am experimenting with adding some weight to them to stop this.