What are you doing to get the above pictures. It doesn't look like you have any ordering applied (considering your number go ...336, 337, 338, 1, 2... in your image).

I would firstly ensure your SELECT statement has an ORDER BY clause:

SELECT *

FROM dbo.Governance G

ORDER BY G.Id_Num;

Secondly, to get your duplicates:

SELECT *

FROM dbo.Governance G

WHERE G.Id_Num IN (SELECT sq.ID_num

FROM dbo.Governance sq

GROUP BY sq.Id_Num

HAVING COUNT(sq.Id_Num) > 1);