The Tables(Number) reflects one thing, and one thing only.  The order in the
document.

Tables(3) is the third table.  Tables(6) is the sixth table.  If, EVER, the
tables are moved, or a table is inserted before it, then its number in Tables
changes.

In other words, Tables(x) does NOT, repeat NOT, point to a explicit table.
It points to a specific table - the xth table from the start of the document.

If this is a persistent issue, then IMO, the best solution (and one I use as
a matter of course) is to bookmark the tables.

Once bookmarked, you can action a table BY NAME.

For example, while I bookmark all tables in my documents, to keep it simple
let's say you have your document, and it has 8 tables.  Say also, you need to
action only one of them.

1.  select the table.
2.  bookmark it and name it, oh....Yadda

Dim aTable As Table
Set aTable = ActiveDocument.Bookmarks("Yadda").Range.Tables(1)

Ta-da!  The Table object aTable now IS that table.  The table can be moved
anywhere in the document.  It can have rows added, or deleted.  It does not
matter.  The bookmark stays attached to the table, regardless of where it
goes.  And from the bookmark you can make a table object, as in the code
snippet above.  Now you can use all the properties and methods of a table
object.

Dim aTable As Table
Set aTable = ActiveDocument.Bookmarks("Yadda").Range.Tables(1)

aTable.Cell(2, 3).Range.Text = "Blah"

would put the text "Blah" into Cell(2, 3) of the set table, regardless of
where that table is.

You can expand this method finer if you want.  If it is a specific cell, in a
specific table, then bookmark that cell.  Then you can dump content into it
directly via the bookmark.

Keep in mind that you can nest bookmarks.  So you can bookmark parts (a cell,
a row...whatever) of a table that is, itself, also bookmarked.

You could try setting the Table.ID property on each of the tables and
then check if against the table you have.  Unfortunately I don't thnk
there is anyway to specifically select a table by its ID.  You would
need to iterate each table in the document and until you found the one
with the correct ID.  You need to be aware however that the ID is not
unique.

Have a play with the code below to see what I mean.  Run it first on a
blank document then again (leaving the tables that were created the
first time).

Hope this helps.

Cheers
TonyS.

Dim tbl As Table
Dim MyTable As Table

   Selection.EndKey Unit:=wdStory
   Selection.TypeParagraph
   Selection.TypeParagraph
   Set tbl = ActiveDocument.Tables.Add(Range:=Selection.Range,
NumRows:=2, NumColumns:=5)
   tbl.ID = "MyFirstTable"

   Selection.EndKey Unit:=wdStory
   Selection.TypeParagraph
   Selection.TypeParagraph
   Set tbl = ActiveDocument.Tables.Add(Range:=Selection.Range,
NumRows:=2, NumColumns:=5)
   tbl.ID = "MySecondTable"

   Selection.EndKey Unit:=wdStory
   Selection.TypeParagraph
   Selection.TypeParagraph
   Set tbl = ActiveDocument.Tables.Add(Range:=Selection.Range,
NumRows:=2, NumColumns:=5)
   tbl.ID = "MyThirdTable"

   Selection.EndKey Unit:=wdStory

   For Each tbl In ActiveDocument.Tables
       If tbl.ID = "MySecondTable" Then
           Set MyTable = tbl
           Exit For
       End If
   Next

   MyTable.Select