Xcode comment uncomment issue

I'm new to Xcode and found something frustrating. I select a few lines of code and comment them out. for ex. ``` // NSString* u = __txtUsername.text; // NSString* p = __txtPassword.text; ``` then I may re-indent the code and the commented code goes like below ``` // NSString* u = __txtUsername.text; // NSString* p = __txtPassword.text; ``` now if I try to uncomment the commented code Xcode produces something like below ``` // // NSString* u = __txtUsername.text; // // NSString* p = __txtPassword.text; ``` in fact instead of removing `//` it adds more `//` at the beginning and removing `//` from commented re-indented code is really frustrating. Is there any solution to that or I've made something ridiculously?