Kickoff on Receiving Team's 10 yard line

[bniu]

That's right, you read the title correctly. Fed rules, We had a late score, visitors take the lead with a couple seconds left, home team players just lose all sense of self control and manage to commit 5 separate Unsportsmanlike Penalties, resulting in two ejections, and the AD having to come onto the field to yank the troublemakers off the field.

Our rules interpreter happened to be the white hat, and we enforced all 5 penalties on the kickoff. So, the enforcement goes from K40 to R45 for the first one, R30 for the second one, R15 for the third one, R7.5 for the fourth one, and R4 for the last one. After marking off all those penalties, we end up at R's 4 yard line. I suppose we can't have R's restraining line be 6 yards into their end zone, so our white hat brought the kickoff back to R's 10 yard line. Kickoff obviously went for a touchback.

Anyone comment on us marking off the penalty correctly?