Is it me or Annotator - datum long dimension

I am trying to dimension using datum long, and change prefixes in the process. I click Datum Long, Horizontal, my starting point, my first feature, then the prefix button which popups up the list of predefined prefix text, I double click the prefix I want. But now instead of selecting the next feature, I am prompted to pick the first point. This dimension is now a separate series from the dimension set I began.

Am I doing something wrong, or is this an Annotator flaw?

I am using SD 9.01C
If it makes any difference my dim.fix file is using this format:
("Pre Fix" "2X " 0 "" "" 0 "" "" 0 "" "" 0)

It's Annotator ;-(
We've fixed the problem in the latest version SD11.00. In the meantime you should define the most common fixes before starting the group and then modify the fixes that should be different afterwards.
Michael