Fall of Rome scenario difficulty bug

[Tigranes]

When playing as Roman Empires culture works backwards -- the faster you accumulate the worse your situation becomes. But difficulty levels are not adjusted for this pecularity -- on Prince you need 67 culture to get your first penalty, on Emperor you need to make 420. So Emperor becomes easier than Prince!

 

[Tigranes]

 

[DemonMaster]

I didn't know that SP cost are increased with DL, when did that happen or is it a scenario thing?