Problem with changing password when using AspNetIdentityDependencyInjectionSample

[skhalil89]

Hi there, I used this code https://github.com/VahidN/AspNetIdentityDependencyInjectionSample to seprate ApplicationUserManager from UI and define it in service layer and after that inject it in UI.
but the problem is when i change the password of a user, the current password will be change in db to the new password(I sure becuase if you change it again with old one you will get the error:"Incorrect passsword") but user can login with old password !!!
I so confused.
please help me and check the sample code in this issuue: VahidN/AspNetIdentityDependencyInjectionSample#9