I applied to a position in StackExchange careers some months ago, and it didn't go anywhere. There were apparently some problems with the process, and it was reopened recently (last week). An email was sent to the previous applicants stating that the application must be resubmitted (presumably using the same link as last time). I send my application again, and I received this message
You have previously applied for this position. A new application has not been submitted.
Yet when I check my sent applications in the messages tab, there is nothing.