Is "Stop on Red" the same thing as "No Turn on Red"?

I got pulled on for disregarding a "no turn on red" sign at an intersection

Heres my problem:

I approached the intersection and saw a "Stop on Red" sign. There was no No Turn on Red sign, only a Stop on Red a couple feet before the intersection.

So I thought this meant you treat it as a stop sign. So I stopped at the intersection, when I saw there was no traffic and i was safe to turn, i turned right.

The officer gave me a citation but THERE WAS NO TURN ON RED sign.. just a stop on red.. I didnt roll through the intersection, i stopped and proceeded when clear

And since it is the end of the month, I figured he was trying to just get money

Do I have a legitimate case? There was no NO TURN ON RED sign... but a STOP ON RED. Do they mean the same thing, so do I have a legitimate case in court? (and he told me about the wrong sign that was posted on the street)