Hi Allison - I think a lot of this will be down to moving house and being a 14 month old cocker. She's a teenager still and they can still surprise you with changes in behaviour. She could also be coming into season again. Sorry I can't remember if you've had her speyed or not. Even if you have, it could still be cycle related. I doubt it's related to her ear problem. Canaural is a very typical ear treatment. Ear prob's can cause them to run around a bit mad sometimes as the pain/itching can be hard for them.
But digging sounds like she's just having fun in her new pad. She needs to learn it's wrong. I'd try letting her out on a long lead for a while and don't take your eyes off her. When she goes to dig, pull, yell "NO" and call her to you and give her a treat. This should distract her from the digging. You could also use a toy to draw her attention. Give her something different to think about than digging.
Do you know if the previous occupants had a dog? Could be related to that.
hth