Hi
The Bet Settlement Simulator does not correspond with the results from Betfair, it is designed to let you test triggers and reset the markets repeatedly without having to wait for actual results. There is a good description in the Help File.
Test (and Real) Mode market settlement using the results from Betfair requires the market to be refreshing in order to collect the result from Betfair.
Depending on how your triggers are set up, it might be better to, for example:
Use a trigger to delete markets where the has been no betting activity after x amount of minutes since scheduled start time
Use a trigger to set the idle and / or in-play refresh rates to a high value after a given time, so they are still available for automatic settlement using Betfair results.
and of course once a market has been correctly settled, the statement is updated automatically and you can use the settings to automatically delete settled markets.
Hope this helps.