Hi Brian. Sorry I only just spotted this. Metadata will only show if it's still embedded in your images when you upload. If you have processed the images before uploading there is a chance that it might have been stripped out. How are you processing your images?
If you open the JPEG in LR or PS and the exif is not visible then it could be something in your export settings that has stripped it out. If it is visible, then it could be getting stripped when uploaded here, although it shouldn't be so I'd need to look into that further.