In most cases where this happens it is because the frequency offset of the CS580 Tx is greater than the range the autocal sweeps.
I would suggest changing the Rx frequency of the openSPOT in 100Hz steps in each direction, you might need to go further than you expect, beyond 1kHz is possible. If there is a reference adjustment available on the CS580 (in the CPS?) you might be able to align it with your other radios once you have determined what the frequency offset is.