Time Machine doesn't backup folders with same name as user
I am assuming you have already checked in in System Preferences > Time Machine > Options to ensure those folders have not been excluded?

We can then use the tmutil utility to find out some more information about this.

From Terminal enter this command:

tmutil isexcluded ~/Xcode/Attila


This will tell you whether it has been excluded from Time Machine backup or not. If it lists

[Excluded]    /Users/Attila/Xcode/Attila


You can then remove it from the exclusions list by running 

sudo tmutil removeexclusion -p ~/Xcode/Attila


For more information on tmutil, check out its documentation