Because the seller may be in the range of actions that must be viewed in the replies and queries sent to the reply date is specified or not. During this time, which may be given to date, still no reply.
The seller may be in the action and respond to the questionnaire that was sent to a specified date or no response. In the meantime, may not be up to date on the back.
Because the seller may range in the reply and have to watch that sent questionnaires have been identified to date reply? During which may not yet specified date to reply.