Find Most Recent Date In Column Headings In A Range - Insert New Column And Heading

I have a 2 groups of column headings with a different month and year in each heading so

1st Group of columns range
Columns AJ through AX
Column Heading example "Expense Ratio February 2013......next Column over is "Expense Ratio March 2013"

2nd Group of columns range AY though CE
Column Heading example "Capital Balance February 2013......next Column over is "Capital Balance March 2013"

Each new month I need to add a new Expense Ratio column after the most recent expense ratio Column. (i.e. Find "Expense Ratio March 2013" and I need to add a column after that with heading "Expense Ratio April 2013"

Same thing for Capital Balance - add a new Capital Balance column after the most recent Capital Balance Column. (i.e. Find "Capital Balance March 2013" and I need to add a column after that for "Expense Ratio April 2013"

Because the ranges keep changing month over month, how do i do this.