Actually, Nick in general is lazy when it comes to research. There have been times when the main Nickelodeon social media accounts have marked anniversaries on incorrect dates. It seems they just look this stuff up on Google instead of using internal records.I guess, NickRewind must be a separate division within Nickelodeon, if they didn't actually do their research:
Their first logo (from 1979) only lasted a year before they used a new one based on the Pinwheel* logo. The "silver ball" logo didn't appear until 1981.
*The very first show Nickelodeon ever made, and even then it was originally a local show from Columbus, OH on the old QUBE service. Oh yeah, contrary to popular belief, the channel wasn't really called "Pinwheel". The QUBE service just had a channel that was dedicated to one show, and that was Pinwheel. I'm guessing that when Nickelodeon launched in 1979, it took over that channel position on QUBE.