Hi Beril,
  Thanks for the graphic and clarification.  Any chance you could send me a copy of your output tbl and flist?  If you don't want to send the whole thing you could truncate it to the first 10 or 20 lines.  By way of some clarification, the fist column (size) should be the same for each ROI region.  However, that does not explain why Avg., SD, and T are the same.

Thanks,
Ben