in the revision table, it reads O,P, Q, R, THEN U. someone got rid of S & T. Ungroup is greyed out, hide/show hides more rows.

In the revision table, it reads O, P, Q, R and U for revisions. S and T seem to have disappeared. Ungroup is greyed out, hide/show just hides more rows. If I start another row it's V. If I delete U and start another it's U again. Any ideas would be thankful for.

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