Though I've never handled a 30-30 barrel, I have not seen an auto ejector on a T/C barrel. Maybe they were put on "hunting" calibers for quicker reloading.
As I understand, the top swiitch was on the later pre-G2 model. I have 2 pre-G2 actions, both bought since 2000, and both are top switch. There is a lot to know about changes that were made through the years.