If all settings are correct during 3D recording your files should not waver in lengths. GoPro CineForm Studio will not accept clips that do not properly align for 3D conversion. You can trim these clips to match lengths before import if you wish to combine these for 3D.
If your cameras are recording in two different resolutions while using the 3D HERO System, the cameras will record in sync, but you will not be able to combine them for 3D viewing. The files will only be good for 2D viewing.
You can only combine two of the HD HERO2 units or two of the HD HERO Original units together to use with the 3D HERO System. The two cameras must be the same type for the 3D HERO System.
If you want to check your GoPro Order Status, we have a tool that will allow you to do that. GoPro Order Status If you enter your info in the tool linked above you will see all the details about your GoPro order, including its status and tracking information.
We are always stoked to hear from the GoPro community and we welcome your enthusiasm about us and what we are doing. If you have an idea or a suggestion for us, we encourage you to check out this page: Connect with GoPro.