I have noticed the same thing about bobbins. They come in a great variation of quality and not all are even worth buying. I have several variations of Class 66 bobbins and although they work through the machines, as you said they don't always work on the winders.
The way I look at it if they won't work on the bobbin winders on the machine you gonna use them in, then they can go in the scrap metal bin.
Joe