iOS sending pictures as 'Full Size Render'

I assist someone with doing online listings. Many times he takes pictures with his iPhone and sends them to me

via email. Every time I get the pictures - instead of being numbered like every other camera/phone on the planet

does - the pictures are all tagged 'Full Size Render'. This make my job infinitely more difficult, as I have to rename

every single one of them, so that my computer doesn't keep harping about them having the same name. What needs

to change on his phone to stop this?? And why is it even doing it in the first place?? It is NOT beneficial in ANY way

for the phone (or iOS) to do this. If anyone knows which settings needs to be changed, your input will be greatly

appreciated. Thanks in advance.

P.S. This is happening when he sends the pictures at full resolution, as we need them that way, or eBay rejects them.