perhaps I spoke to soon!
After going away from the staff search screen and going back in, then selecting edit again, the attributes have all gone back to the originally selected. i.e. they are no longer all physiotherapy. They have gone back to the original stat selected, in this case 'adaptability' and 'Goalkeeper Shot Stopping'
It also changed them to all be 'Is between' filters, when before the 2 at the bottom were 'is at most' and 'is at least'