Yes, be careful. This problem affects much of the ColdFire documentation.
You need to treat the term 'System Clock' with caution in any ColdFire manual. It is sometimes used for the bus clock and sometimes for the core clock.
In some of the manuals there is a helpful diagram (usually in the PLL section), which shows the clock routing to all the peripherals. You can use it to check which ones receive a divided-by-two bus clock.