It's right. The pairs aren't skipped, they make logical sense so the TRa/Ax/Lg/L stays in order.
On a 10 button set, you fold a2/a9 a3/a8 a4/a7 and a5/a6 into the pairs and you always have T&R every 3rd pair. The only extremely weird punching is the L/L9 moves into the 23rd pair.

If you got extremely lazy and ran out of 3 pair jumper wire, you could install a 1a2 system with 2 pair jumpers after the 1st line. Of course, it was required and made for a neater looking frame if you actually did that, otherwise you ended up with a spare wire from every jumper hanging in the frame.

Carl

of 3 pair

This model is end of life