chris
If your export looks like the screenshot in post 6, then please write your Publish+Share settings in a reply to confirm your present situation.
Publish+Share
Computer
and then what?
MPEG
AVCHD
XAVC-S
AVi
Windows Media
QuickTime
Image
Audio
You might only be seeing MPEG, AVCHD, and XAVC-S in the list because the other are hidden from view. You need to use the small scroll bar to the right of the choices to scroll down to the ones beyond XAVC-S.
If you select MPEG and do nothing but accept the first choice of Presets which is NTSC DVD Standard, then you are going to get a 4:3 export. Under those circumstances, you have a 16:9 project setting, then you are going to get the type of result that you are seeing in post 6.
If you are doing that, then look at the MPEG Presets = NTSC DVD Widescreen, do your export, and let us know if all is OK.
Do you have any special receipt requirements for the export? With further information from you, I will help you with the export setting appropriate for your project and maintaining what you are created in the edit area.
Thanks.
ATR