Flyer29er,
Are you trying to teach yourself, or are you having an instructor help you? If it did this to your instructor, and he doesn't think he had a dumb thumbs moment, there may be an issue with the airframe that needs to be addressed. Your nose wheel may have way too much throw, causing it to be very twitchy on roll out. I don't know what you mean by "wobble", so I can only guess. If you are going it on your own, then this is just the first of many frustrating moments in your future.