I honestly can not believe this isnt addressed nor that it is a priority.
Every day I have buy and sell orders that are a day old. I have bags with 3x the limited amount because the coin was on a bad sell order which never cancelled.
There is no reason why sell or buy orders should stay active after a few minutes, because the market has already changed during this period.
The solution is easy: Automatically cancel buy and sell orders after X minutes.