Tech or Throw in Violation?

[Larks]

NF Please.

A1 is on the end line OOB with the ball preparing to attempt a spot throw in. A2 is in the paint. A2 proceeds to run OOB Behind A1 and returns in play near the sideline ready to receive a pass.

I went with a throw in violation but should or COULD I have had a tech?

Rule Book

9-2-12 No teammate of the thrower shall be out of bounds after a designated spot throw in begins.

Penalty: Violation

But the book also says this:

10-3-3 A Player Shall not leave the court for an unauthorized reason or delay returning after legally being out of bounds.

Anyone have any other references to this sitch and how would have you called it.

Larks
VIT