substituting

[chasbo]

I will be doing my first games this spring and as I was reading over the NFHS 2003 case book I became quite confused as to 3.1.3 sitch A. To sum up it states that F8 is a starter and is batting 2nd. In the 2nd inning F8 is replaced. Subsequently the coach desires to re enter F8 as catcher and bat 8th. in the ruling it states this is not legal, that F8 may re enter and only bat 2nd. So the way I read this, both F8 and her substitute are batting 2nd. What am I missing here?