I noticed this after upgrading to verison 4.1 from 4.0.1. I turn on supports then go in an manually create and edit them. The problem only happens when I have more than one model being sliced and printed at the same time. Here is what I do, fully repeatable:
1. Load two models.
2. Turn on supports int he profile.
3. Manually add the automatic supports.
4. Manually remove all supports from one of the two models.
5. Edit supports on remaining model, removing most of them and adding a few more for good measure.
6. Slice both models.
BOTH models will have supports. The one where I edited them (adding and removing) will only have the supports remaining that I allowed it to have. The other model, then one where I removed ALL the supports, will slice with all the supports STILL IN EFFECT. It is as if I did not tell it to remove them.
I have not tried manually removing every support instead of just using the quick and easy remove all supports button...but I should not have to go through all that effort since a button exists which does it for me already.
Updating to 4.1.1 did not fix it. Images are below. As you can see, it is as if I did not tell it to clear all the supports off the second model. How do I make THAT model print without supports while still printing the FIRST model WITH supports?