Check your sorting. It sounds like you're not on Filename.
No, sorry. This is a funny thing that Elements does, but PS can't. Elements automatically opens all images at full screen; where as Photoshop automatically at the next nearest standard zoom (66.67%, 50%, 33.33%, 25%, 16.7%, etc) below full screen.
It has nothing to do with Bridge or ACR, by the way. It's the same if you're coming from LR.