The only thing that I can figure about switching for different aspects of life is we all lived in fear and terror, we were beat into submission for so long that we lived as an empty shell well into the 20's. Anytime we tried a new activity like sports, band, color guard, we were criticized, put down, and made to feel worthless by parents. 18 years of this.
When trying something new, I'd dissociate out of fear of trying, being criticized, and failing, then another would step up and take on the new activity, coping skill, situation,....We all learned a different skill set. Even today, if something unfamiliar takes place that is scary to me or an other, another would have to emerge to handle it. Happy to be alive was beat out of us.
We really didn't pull it together till we were in our mid 30's. We came across as not having any real personality because we started so late in life learning and living. We were stunted. As a new alter emerged to learn a new skill, each came across as naive and emotionally stunted that we were open to ridicule both publicly and privately which even caused more dissociation to escape the hazing.
This is the why we are so fragmented. Even thinking about it today makes me sad. Sad for us to have endured such a messed up childhood...and now adulthood.