In Response To 'Re: Re: How to display two digit number'
If you are using numbers for all this then how are you able to tell the difference between 13.5 and 13.50? Mathematica displays both of those as 13.5. I don't believe it is keeping track that you believe one of those has three digits and the other has four.
If you are using strings for all this then why not write a little simple function that RegularExpression to split off the two mumeric parts, insert zeros as needed and reassemble the string?