When consecutive sentences are imposed for misdemeanor under this division, the term to be served is the aggregate of the consecutive terms imposed, except that the aggregate term to be served shall not exceed eighteen months.
When consecutive jail terms or sentences of imprisonment and prison terms are imposed for one or more misdemeanors and one or more felonies under this division, the term to be served is the aggregate of the consecutive terms imposed, and the offender shall serve all terms imposed for a felony before serving any term imposed for a misdemeanor.
R.C. §2929.41