LLC deducts health insurance premiums on Schedule A

I have an LLC partnership consisting of my Wife and me.    I deduct the health insurance premiums paid by the LLC on Schedule A.   I forgot to put the amount on Line 13 code M.    I do not know if I am understanding this properly, but IF the LLC pays the health premiums and deducts from the gross, does it count as a personal deduction?  If I enter the amount on line 13 code M,   ir REDUCES my taxes.   This doesn't make sense.