Locked handson free throw?

[wyo96]

7th Grade Girls.(explains a lot!)
I have never seen this one....

Free thrower A1 has the ball and the 10 second count has begun.
B1 and B3 grip and hold hands in front of A2, all three are in marked lane spaces. (if I would have seen it before ball at the disposal, I could have told them not to do it)

I called a lane violation (delayed) throw missed, substitute throw was awarded.

However, on reviewing the Rules, looks like 10-1 Art 10 applies and should be a Team Technical.

Therefore, when seen blow whistle; even if ball at throwers disposal; clear lanes, let A1 finish shooting awarded throws,
then let any Team A member shoot 2,
ball at half court for Team A.

Sounds harsh, but am I reading the rule right?