Wrong criteria search on system fields for today ?

Wrong criteria search on system fields for today ?

hi

just make new view for working app

there is about 26 today entries 
but with criteria " Added_Time == today " system finds 12 entries
and with criteria " Modified_Time == today " system finds 0 entries

in all entries report for today (for example) are 26 entries
how can i make criteria field to view current today's entries?