The concept of "premiere" sports was a rather ambiguous section in the guidelines from 2012 to 2016. The review of the guidelines for 2016 revealed, according to the meeting minutes, that all direct expenses are already covered by child support. Higher income families were seen to partake in these activities and when lower income families did so, they took away from other activities that were not as important to them. The 2012 through 2016 guidelines rule that one parent should pay additionally for these activities led to "double dipping." Therefore, it was decided to remove that section of the guidelines.
In your case, it sounds like you already have an agreement on how to pay for these expenses. In that case, your agreement would be the precedent. If you don't have an agreement, the guidelines could be referenced in this matter. Typically, when parents are not paying support to one another directly, they are sharing the direct expenses. So, it sounds like maybe you are somewhere in between a shared expense plan, and the Equal Parenting Time formula (where one parent pays for all direct expenses).
I guess I can't really give you any clear direction because you aren't really following either shared residency child support model exactly. I will tell you that typically when a parent has been voluntarily paying for an activity and then decides they don't want to pay, the court sometimes just orders the payment. They do this because they view the voluntary payment as approval to participate. You may end up rocking the boat unnecessarily.
If you'd like to play with the numbers yourself, I recommend you try the free tool at
www.efamilytools.com. By calculating child support using each method, you can decide for yourself if you want to challenge the payment for soccer.