JD, welcome to iRV2.
In my experience with Weather Pro, they will not supply parts or repair information to individuals because of "liability" issues. Apparently, if you don't handle the awning properly during disassembly and re-assembly, it can cause injury.
I called once with a question and they wouldn't even advise me on what they thought the problem might be, let alone tell me how to fix it. Their only response was to offer to give me the names of authorized repair shops.
That being said, the rear arm of the awning is designed to slide and allow the awning to dip down to shed water loads when it rains. Make sure you are not mistaking this tilting action for weakness in the gas strut. However, if gas strut is bad, you can probably get a replacement strut at an auto parts store; but I don't know what you would get into if you tried to remove the strut yourself. Maybe someone else out there has experience with replacing the struts.