Folders numbering

My Gmail Folders are not properly filed. For example i have 12 folders 1.xx, 2.yy… 12.zz and when you open EM Client you will se first .zz and then 10.xx., 11.xx, 12.xx and then 2.yy All characters are in English. Gmail shows all the folders in the proper row.

Some applications will list 10 before 1, some don’t. The only solution I know, that will ensure it is always in the order you want across different applications, is to prefix single digits with 0. So 01 and not just 1. If you get into hundreds, good luck with that, you want your numbers to be 001, 010, 100.