A couple issues here. This is assuming your screens are fairly new, and your press is fully functional.
Your pressure is way inconsistent at the edges of your design. Hold the squeegee closer to the edges and put nice firm even pressure and pull slowly (not slow, slow, nice uniform pull) with a slight angle on your squeegee. After your stroke, the screen should be cleared completely. Meaning there should be no ink in your image area of the screen. Pressure and speed of your stroke are very important and one of your biggest problems with that white.
Also, you are either having major registration problems, or the shirt isn't being held down properly, or you are majorly shrinking the shirt when flashing the white. I see a double image of the white underneath the gold. So I am thinking that shirt might be picking up off the pallet. If you are using a mist adhesive, make sure that the shirt is being held in place. Not a ton of glue..(the shirt shouldn't have to ripped off the pallet) just enough so the shirt stays in place. Once you know the shirt is in place, check the registration. And once its registered make sure its locked in place. Same with the off contact. Give yourself slightly more then a nickels width. Adjust the pitch and the height so the screen is parallel with the pallet.
If you are doing all the above things correctly you should have no problem with a print like this. Practice printing that base over and over. Once you get that "feeling" of what you have to do to get that nice smooth print things will go much smoother. Hang in there.