There was a bit of a snafu around the release of 24.8.1 - it was made available, then it was retracted, then it was available again, but not for all of the family cards. So if you have an older graphics like Vega or Polaris and you install 24.8.1 it's actually giving you 24.3.1 as you observed.
You didn't mention what graphics you have but if you search under the Previous Drivers you should find 24.7.1 there that you can reinstall.
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT