accounts tab of a user's profile, words questions and answers are used even when count is 1. For live example, you can go to my profile & click
accounts tab. Scroll down to Drupal Answers row where you can find "1 answers" which should be "1 answer". Or, scroll down to Server Fault row to see both "1 questions" and "1 answers".
Page on Stack Overflow
Page on Stack Exchange
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This is not a bug.
It's actually a clever feature designed to encourage people with obsessive-compulsive tendencies who are bothered by this sort of thing to contribute more content to the site.
If you ask another question and post another answer, the problem goes away. It's not the developers who are at fault here, it's you!