MSP and CA PPM are showing different values in % complete field.
In MSP you can deactivate task and when are exported to CA PPM, this take as active tasks (PPM does not work with that option).
In PPM shows this task as 0% of percentage completed.
CA PPM all versions.
Delete the task that you don't want to use in MSP instead of deactivate.
Otherwise activate all deactivate task in MSP.