batch level conversion to material level

Hi Sap gurus,

I recently did a batch level conversion from plant to material level.However I noticed that when I create a batch the batch info is stored in both MCHA and MCH1.My understanding was at the plant level ,the batch data will only be stored in MCH1.

I would really appreciate any help on this from the sap gurus on if I am missing out on any config that needs to be checked?

Thanks again