The total question indicator for the "Unanswered" tab is 2 to 3 times higher than the actual number of questions displayed (by multiplying the number of pages with questions per page). Some examples:
- Stack Overflow: 833,807 vs 292,100 (5842 pages of 50 questions)
- Meta Stack Overflow: 6,252 vs 2,145 (143 pages of 15 questions)
- WordPress Stack Exchange: 2,125 vs 945 (63 pages of 15 questions) - this is where I noticed it
Maybe it is counting questions and answers for the unanswered questions?