I'm trying to export my Photoshop artboards as 800x800px jpgs. I hit Export As and changed the dimensions to 800x800px. It shows me it's scaling it down. Great. I hit Export All, and it saves the jpgs where I tell it. When I then go check the file dimensions - one of the artboards won't save as 800x800px! I tried again and can see that in the Export dialogue box it WON'T let me put those dimensions in, but has to change them to 754x800px. Why in the world? It can scale it to other dimensions, just not that one..?! Please help!