Hi photo, don't worry I'm not taking anything the wrong way, I know it's confusing when something doesn't work like you expect it to!

Filleting just tends to be a particularly sensitive area and there are just so many different possibilities that it's hard for me to know what happened in your particular case without being able to see the actual model.

It's not unusual to need to do some extra steps like maybe rotate a sphere a little bit to position it's seam edge to be more friendly to the fillet limitations and stuff like that.

Anyway, definitely when something is not behaving as you expect it really helps to save the 3DM model file and post it too and not just a screenshot, because I can't do stuff like rotate around and zoom in and stuff like that with a screenshot like I can with an actual model file to actually see more details about what is going on with the model.

- Michael