Cell Vertical Alignment Not Working

All my spreadsheet data appears to be at the top of the cells.
I have tried: 

let totalFormat = wb.addFormat()
    .font(size: 12)
    .align(horizontal: .right)
    .align(vertical: .bottom)

to force the data to the bottom of the cells without success.
The horizontal alignment works ok.

github doesn't let me add an Excel file