They ALL wobble. There is no more reason now for you to not breed your snake
than there was before you noticed the wobble. If you don't want to have/breed snakes that wobble your only choice is to not work with spiders.
When you say "a pretty serious wobble" what do you mean? I have seen some before that sit with there head upside down almost 24hrs a day and some that literally roll around in the tub. Is yours that bad?