@isheian - That's a good looking stand! Imo, with the waterproof stain on there, it'll only get prettier.
The supporting issue of the back leg: I had this too & did two things to fix it. I looked at how much my ridgepole bent when weighted down and took that into account for choosing where to hang it into the loops. When you take the position of the two hanging loops unweighted, my hanging loops are closer together in relation to each other on the top and slightly more outwards on the bottom. When I lay down however, each loop becomes perfectly vertical because of the bending of the pole, making sure the weight is pulling straight down on the tripods instead of slightly inwards. It was this slight inward pulling that was taking of weight of the back leg. When I made this adjustment in the loops, the legs became unevenly stressed, so I moved the legs around, moving them an inch or so clockwise each time and test after each adjustment, until the problem got better. Now I know pretty much how to position them and the hanging loops to make sure it doesn't happen again. Anyway, it helped for me, I hope it does for you but if it doesn't for you, than I hope somebody else has something that will help you out.