When you receive an empty leg request, your scheduled availability has not been considered. Avinode shows the best out of the available empty legs.
In the section for potential empty leg matches in the search result we show those that have a similar route and they take place within 24 hours of the requested itinerary. This is because many Empty legs has some flexibility. Some operators want their empty legs to show for multiple days, others want just that specific time.
The buyer who has sent the requests for the empty leg know that this might require flexibility for their end client if they chose an empty leg, maybe the end client has this flexibility and therefore they requested the Empty leg even though it was on a different day.