I wonder if it's possible to merge 2 balloons to 1, so there are not 2, 3, 4.... Ref lines to 1 point (Bolt - washer - ....)
I have wondered the same thing, but haven't found anything so I do as you do on the attached file.
One BOM flag for 1 item. The BOM flag contains the reference to the model (sysid if you are using Standalone BOM), or the Model Manager document (ELID if you are using Model Manager).
Is there a way to align different balloons?
Only way I see is to draw a horizontal construction line to align them.