Awesome but one thing is missing

I love everything about this app except for one thing I wish that it not only sorted my contacts alphabetically but also numerically The app right now organizes them in a weird way for example 1 10
11 12 13 and etc. I would like them to be organized like this 1 2 3 4 5 6 7 8 9 10 and etc.

mikeymnw about A2Z Contacts - Group Text App