Appendixes not numbering properly

I need some help with setting up numbering of multiple appendix files in one book. Three are three appendixes (A, B, C) which are not numbering properly. After I update the book, they all display Appendix A.
I have an AppendixTitle paragraph tag which has no numbering properties and an AppendixNumber tag which in the Paragraph Designer > Numbering (tab) uses this in the Autonumber Format field: C:<A+>\st
And in the Properties field, Numbering.

The appendixes are numbering OK in the TOC using the Numbering Properties > Chapter (tab) of the three Appendix files with
Chapter #: A and Format: Text;
Chapter #: B and Format: Text;
Chapter #: C and Format: Text.

On the Reference page the AppendixTitleTOC tag looks like this:
A <$paratext> <$chapnum>-<$pagenum>

I am using FM 7.2p158 on Windows XP SP2.

Thanks