Your furfamily sounds delightful Val! Oliver sounds very much like a ch kitty from your description. When you have the time, you may want to read the stories members have posted on the ch kitty club...http://www.chkittyclub.com/pages/members.html
I have several cerebellar kitties, and the way you describe his goose-stepping type walk, is a very common thing with ch kitties, head tremors as well. Glad you joined up here, and as you've been warned, it will become addicting! Jan