The spindle you use has something to do with the method used for winding the thread on spool. I think the both come off easily if winding from the top. O use a big cone and it makes n difference as they both have to go up up and away t the machine first.
I think some berninas are very fussy while another is laid back and doesn't care.my machine is not fussy at all I have friends who have to be very careful.