I’m not sure if you remember me but I had EICC last Friday…

I’m not sure if you remember me but I had EICC last Friday to talk about custody and parenting. I have always been the primary care giver and when my ex left the children last year I continued to be the primary care giver. The children (9 and 5) are living with me full time and only recently have been spending on overnight with her and seeing her an additional two nights a week for dinner.At EICC we did not get to into detail about our backstory and the justice said that shared parenting is what is likely going to happen if this goes to trial and could cost more than $20K each and I may have to pay part of the ex’s cost if I loose. With that I was scared and decided to try and work out a parenting plan and decided every other weekend the kids can stay at their mothers and she will have them for an additional day during the week for dinner. Started in January she will have an additional overnight so her time with the kids will start Thursday - Sunday evening on her week.Her lawyer has written in the interim order to go to a hearing in spring 2020 with a move to shared parenting.Can I update that phrase and have it say that it will go to hearing with a possibility to move to shared parenting?I believe the ex wants to do 50/50 parenting so that she can stop paying me child support and I will then have to pay her child support.My question is shared parenting always a 50/50 split? Can it be 60/40?What if the children have adjusted to the schedule, would the justice make a major change to the interim order and change it to 50/50 permanent order?Another question is that the children have also taken Chinese as a first language on Saturday mornings and I know that the ex wants this to end as they do get homework. Can I put in the interim order that Chinese school would continue?