Manusmriti is full of contradictions as many scholars on the text have said. I expect the RSS to stump the leftist historians and other commoners like you.
Other scholars point to the inconsistencies and have questioned the authenticity of verses, and the extent to which verses were changed, inserted or interpolated into the original, at a later date.
Sinha, for example, states that less than half, or only 1,214 of the 2,685 verses in Manusmriti, may be authentic.
[63] Further, the verses are internally inconsistent.
[64] Verses such as 3.55-3.62 of Manusmriti, for example, glorify the position of women, while verse such as 9.3 and 9.17 do the opposite.
[63] Other passages found in Manusmriti, such as those relating to
Ganesha, are modern era insertions and forgeries.
[65]
Nelson in 1887, in a legal brief before the Madras High Court of British India, had stated, "there are various contradictions and inconsistencies in the Manu Smriti itself, and that these contradictions would lead one to conclude that such a commentary did not lay down legal principles to be followed but were merely recommendatory in nature.
The Laws of Manu
George Bühler, translator
(Sacred Books of the East, Volume 25)
http://www.sacred-texts.com/hin/manu.htm