$75 to calibrate a torque wrench?

yes, that's why I said clicker as there are a few styles out there.
Yes you did. Many of the click type wrench adjustments are leaded in and a older wrench may be well worn inside. The spring, the torque rod, and the breakaway block and socket can all be worn. It may be accurate at lower torque but a long way off from half way to it's upper limits.