Arrival Times for Piston General Aviation at Houston Hobby

Any idea why the arrival time shown for piston GA arrivals at Houston Hobby in the afternoons is anywhere from 6 to 23 minutes before the last entry on the flight log at or above 200 feet. I know that Hobby requires transponder on for taxi, but I do not believe this is a factor.

Seems like ATC is reporting aircraft as arrived when turned over to approach.

Despite the fact that our main office is in Houston and plenty of the developers fly out of KHOU, this is an unfortunate, ongoing issue that we’re aware of. We do not get data from Houston TRACON, only Houston Center, and their data handling for low altitude (read: piston) flights is suboptimal.