Oddly enough I've seen this granted in TN. It was not the ONLY issue before the Court - part of a hearing with both sides wanting some changes in the parenting plan. It was a little odd.
Mom and Dad had 1 child (daughter 10) with dad having every other weekend. The parties lived about an hour apart.
Dad remarried, Dad's Wife had one child (son 9) - step-siblings were very close - bonded right away and close in age. Daughter quickly made many friends at Dad's home including many of stepbrothers friends from attending many sports and school activities on those weekend visitations.
Problem was, though Mom and Dad's parenting plan wasn't specific on which weekends (1st, 2nd, 3rd, etc.), step-brother did have specific visitation in his parenting plan of (1st and 3rd weekends). So what happened was eventually the weekends got off track.
Step's Dad even swapped a few weekends because the children were close. He would have had no problems doing it permanently, but he had another child whose Mother very much minded that child's schedule changing - not because she wasn't easy to work with but she too had another child with a specific weekend schedule and that child's Father was unwilling to change.
Daughter's Mother absolutely refused to budge on the matter for no reason at all and really had no obligation to, EXCEPT
this case had a GAL appointed for all the other parenting plan issue and she put in her recommendation that the daughter had a very strong bond and relationship with her step-brother and felt it was important to keep that relationship since she was an only child and that every avenue had been exhausted on the step-brother's side and it was not feasible due to the weekend specific Court Orders.
Long story short, Court said it was easier to change 1 Court Order than 3 other Court Orders in the best interest of the child. Court found that Mom would not be harmed to clarify the Court Order to make their visitation specific to 1st and 3rd weekends since it generally said every other weekend.
So yes, it this specific case, it was changed.
Hmm...interesting. Of course dad lost 2 weekends a year by going from every other to 1st and 3rd, which may have factored in a tad (even if dad didn't realize that at the time). That gave him 24 weekends a year instead of 26.
However, I think that we have to consider that to be a fairly rare case. The only times I personally have seen that happen is when there are half siblings involved, and the half siblings would never get to spend any time (or quality time) together unless they were on the same parenting schedule.
The most interesting case I ever saw, (and in that case divorced parents both happened to marry widowed parents), that family exchanged ALL children, siblings, half siblings and steps, every other weekend.
It was the coolest thing I had ever seen. On top of that, ALL of the grandparents treated ALL of the kids as grandchildren, including the grandparents of the deceased parents. They all also celebrated holidays as a group.
So, all of those children got raised as a "tribe" LOL every other weekend and holidays. Of course it was not court ordered, but it still was the coolest thing I have ever seen. It started out with 4 children, and morphed to 8 before I lost track.
