My numbers do not sort properly

Hello All,

I've attached a sample spreadsheet. I have two questions:

#1 When I sort the spreadsheet from smallest to largest, by case id, shouldn't the cases with numbers like 111001111-01 be first followed by these... 20000000234568?

#2 When I try to do a custom sort by shelf then by case id, excel treats the case id numbers as text. Why? I've formatted the cells as numbers.

Are my sorting problems due to the fact that some of the cases end in "-01"?

Thank you.