I'm sorry, but you're just not getting it. The Numbering dialog establishes
the formatting (including position) of the number only. The Paragraph dialog
establishes the alignment of the paragraph. When you create or modify a
style (Body Text, say, or List Number or Heading 1), if you will click the
Format button at the bottom of the Modify Style dialog, you will see that
there are numerous properties you can define in the paragraph style. One of
these is Paragraph; another is Numbering.
It is possible that the Left, Right, Center control in the numbering dialog
is confusing you; that governs only the alignment of the number relative to
the "Aligned at" position set in the dialog. For example, say you have
specified that the number should be aligned at 0.25". If you use the default
Left positioning, then the number will start at 0.25" and extend to the
right as far as required. If your numbers will be longer than a digit or
two, you may need to increase the amount of the "Tab space after" setting to
prevent the number and tab from overrunning the tab stop. If you select
Right, then the number will end at 0.25" (that is, it will be to the left of
the position). If you select center, the number will be centered at 0.25".
The settings are comparable to Left, Center, and Right tab stops. None of
this affects the alignment of the paragraph itself, which is set in the
Paragraph dialog.