Generally speaking, yes, there is a statute of limitaions for filing a motion for contempt of a court order.  I believe in Arkansas it is one (1) year but I would really double check that and it is unclear if you are writing from Arkansas or that is the state in which the order was issued and which the courts will consider because orders that deal with children are generally brought in the state in which the kids reside. It does seem as if he is retaliating but I would not give up. I think that you learned a hard lesson here that everything agreed to should be agreed to in writing.  Good luck.