Troubleshooting for Goalrilla
Yes, these bolts are used if you need to make adjustments to the pole. With the pole resting on top of the nuts they can be turned so you can make sure the pole is plum. After making your adjustments tighten the top nuts securely to the plate against the lower nuts.
The arms are assembled incorrectly. The arms should be flipped over to assemble in the shape of the letter "Y". Failure to do so could result in significant damage to your glass and void the warranty.