Sorting more than 9 sheets within a report



I have created a report which contains 25 sheets and data contained within each. To keep the view simple I am grouping by sheet name so each "chunk" of data relates to a single sheet.

What I would like to do next is sort the report using the sheet names. I have tried multiple ways of doing this but cant get what I want.

I have tried re-naming each sheet with an incremental number to start with. This works nicely for the first 9 sheets, but when we run into double digits smartsheet is putting all the '1's' together eg 1, 11, 12 instead of 1, 2, 3

I have tried this also with letters but smartsheet doesn't seem to recognize the single letters at the beginning of the sheet name.

Would anyone have a solution I can use in order to sort sheet order in a report where there is more than 9 sheets?