Using Hand Signals

I was driving my sister in-law's 72 Nova had been working on it for her, there was a state trooper behind me and her signals didn't work so I gave a hand signal for a right turn, he followed me in and pulled me over. Told me it was legal but gave me a warning to get it fixed. I always wondered why if it was legal why get a warning, guess because it came with signals and they weren't working.