My response:
So, the fact is, you're NOT receiving child support from BOTH Dads. You're only receiving what is due to you for the first 4 years or so, and then you're planning on telling Bio-Dad when he's done paying the arrearages. Also, you'll be informing Adoptive Dad about your receipt of arrearages from Bio-Dad, right?
Also, you plan on informing the State about Adoptive Dad's child support payments, right?
Yeah, right. Not as long as there's money to be made on the deal!
Next, you'll be writing to us about how this whole thing has blown up in your face!
IAAL