I think it is because answerbank have decided to 'highlight' some questions which means that they will stay at the top of the page for a period of time irrespective of how many of us ask other questions. This means that you have to recognise this and go below their chosen question to find out what is the most recent question
To be honest, I can't really see who this facility aims to serve - not answerbankers like me I have to admit.