It is amazingly uncommon for custody to be shared in that way. Moving house every week, back and forth, is incredibly stressful and disruptive for a child.
And then in the update, it's referring to how that "visitation" schedule was reinstated after the first incident. One, that's not visitation, that's true joint custody - a thing which is also rare in custody cases. Normally, you have one parent who has custody, and the other has visitation. Visitation usually means something like "every other weekend," so the non-custodial parent gets the child two days out of every fourteen. If it was true joint custody, the switchovers would be more like "every other weekend, and all summer," especially with an elementary school aged child.
That's not even addressing the fact that, in the story, the court just went back to that ridiculous arrangement after one parent was shown to have abused the child.