Just in case you're manipulating the wanted IVs in RNGReporter to be lower, that is not correct.
The previous PIDIV you had was probably correct, it is just that you need to lower the IVs on your end.
To explain in games term: The PID and IV was generated in succession correctly by the game. However the game then copied pasted the IVs wrongly.
So RNGReporter -> Generate PIDIV normally, then,
when pasting the IVs into the PKHeX -> lower the IVs to match the glitch.
Alternatively, just make your Lati@s to be from Emerald. Emerald isn't affected by this glitch.