changing knock map changes ign retard tp & rpm cold timing

[RomChip200]

if TempInitial>15°C and TempInitial<35°C and Temp>30°C and Temp<55°C and TP<44 and rpm<2600 ==> it means the ECU forces the timing to 15° BTDC and 20° when rpm goes above 2000, and this is applicable when you're driving in this area.

Anybody has an idea of the rationale behind that ?
That doesn't makes sense, putting more advance on a cold engine improves driveability.
At least, on E85 fuel, keeping this makes the engine bogging down.