I wouldn't be embarrassed. You just demonstrated one of the most crucial traits for crossword puzzle solving.
I'm a champ at Soduku but could never solve crosswords in ANY language, and I speak four!
Three issues of the magazines. Issues as in copies or volumes - not problems.
I sense you might be making a joke, but just in case: I'm pretty sure he means that three issues of The Daily have come out in the three days since the app's debut.
He meant issues of the newspaper - it's a daily, so there's a new "issue" every day. Or were you joking?