Layer A _ Text Elements is a combination of A-Anno-Notes, A-Anno-Symb, A-Anno-Keynotes, and A-Anno-Text.
The reason for this:
Archicad layers are not associated with line type and pen weight as in Autocad. They merely exist to turn on/off layers in the view map. There is no instance(that I can think of) where these items would need to be toggled on/off seperately.
thanks