When I come across a simulation it says it highlights them in red, but I do not see it always highlighted in red.
Thanks for the report. I think it has to do something with being zoomed in when the Finished button is hit. The development team is aware and working on it. I hope it will be fixed soon. Also some transits are hard to spot because their depths are very small so it could be in a few cases as well that the dips are not easy for humans to spot. The simulations help the science team understand what we can and can't find collectively on Planet Hunters.