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LTC4332 remote SCLK faster than local

Our use of the LTC4332s is based on the example application circuit within the datasheet. Both local and remote are set to the 2MHz clock via SPEED1 and SPEED2 pins, yet when measuring the REMOTE_SCK signal, we see around 2.16Mhz, while the MCU_SCK is correctly being fed a nice 2.000MHz.

Are there any known issues running at 2MHz that would cause the remote side to have a faster clock? Perhaps specific components/circuit layout/register settings need to be applied at this speed?