The Pointing state (aka side of pier) doesn't change as a mount tracks through the meridian. A mount that is tracking an object starts with the OTA on the West looking at the object on the East with a pointing state of pierWest. It stays in that state as the object passes through the meridian so the OTA is on the West, looking West.
The pointing state only changes when a slew is done and the mount does a long pier flip slew so the OTA is now on the East side of the mount, still looking at the same object.
Until recently EQMOD allowed the user to set a variety of implementations for SideOfPier, few of which were correct. The latest version,1.29m IIRC, has an option to set Strict ASCOM compliance and that's the simplest way to ensure that EQMOD is setting this correctly.