Didn't see the offending posts since they were already deleted, but been-there done-that enough times with other tracks to probably know their gist...
Personally I don't like Facebook pages for businesses like race tracks. They're a hodgepodge of random posts that you have to keep scrolling through to try to find any real information, and with so many people acting so negative on social media those pages seem to be a bad business risk. Occasionally a track will flesh out its Facebook page using those categories on the left hand side, but even there they don't keep current.
I got blessed out by a track promoter a few years ago merely for stating that I couldn't find his class rules on his track Facebook page. He did not have a regular website going, and he wasn't using the left hand categories. He expected people to scroll through pages of posts to find his rules - and not miss subsequent posts of changes - and was quite vulgar about the competency of anybody who couldn't decipher his mess. Later, when I asked about a clarification to a rule, he actually challenged me to go to his track where he (and his buddies) could fight me! So obviously I raced at another track... since then he's toned it down a bit since he finally realized how much business his attitude has cost himself.
Fix everything by pouring dirt on it? Should have him ask Friendship Speedway about that one too. Friendship was originally dirt, but due to poor management eventually closed. A new buyer paved it, expecting colossal success, but after a few years the track was closed again. So in come new promoters, and they dump dirt over the pavement (the owner didn't want his paving torn up). The track soon got a reputation for a surface that was like racing in a cornfield. They kept adding dirt and eventually the surface got better... but now the track is closed again. And gonna open back up with new promoters who "will do it right" - "soon"...