When using the magic wand tool, as soon as I click to start my selection, everything in the image is selected and the icon changes to an arrow with a dotted box next to it. I've reset the tool multiple times and re-started but cannot resolve this ?
Do you have "Sample All Layers" unchecked? And/or do you have an empty layer, or solid color layer (like a white background) selected? (This will create a selection of the entire document) Make sure your layer has image content on it or make sure "Sample All Layers" is checked.