hi cafedm

The planes aren't flying randomly - not possible - they are following flghtplans. If you have the 'same' plane flying on the 'same' route at the 'same' time, you have duplicate flightplans in your flightplan.txt file

From the pic you show, it looks as though the factor is 2. Planes from different airlines don't count - they seem to indicate that you have copied a plan for one aircraft and used it for another but not changed the times. Although copying flight plans can obviously save a lot of keyboard input it gets a bit silly if you don't change the times

So open your flightplans.txt file and do a search for the airport where you know the duplicate planes are flying to and pretty soon you'll find the duplicated code. But unless it's in a block it could be a problem deleting it manually.

If it's not, and spread randomly through your flightplans.txt file because of how you've installed your AI traffic, it will be best to put it down to experience, delete your traffic.bgl file, restore the original (which you should have saved if you're wise) and start over again.