PPP was consistently way off course on its polls during the primary between Rick and Kay (link).
PPP is a liberal poll of course... and it has a horrible track record in recent Texas elections... they wildly inflated Medina, had Rick at around 39 or 40 percent the entire time... basically they sucked. A joke is putting it mildly.
At one point they even had Kay up by 25 points, which was always a joke.
Simply put, don't buy this poll. Rick as I have predicted all along will win by about 10 despite any poll along the way saying it is tied or Rick is up by 20.