The meridian situation sounds like a time problem. Set your offset to -240 instead of the correct -300 and try it. Leave DST=N I am using mount updates Kstars and things work correctly when I set mine up this way. I'm in the Atlantic time zone -240 and I set it at -180 DST=N

As for park, my CEM25P (Non EC) exhibits the same behaviour as yours when I set park to CWD position (same as home position). It takes off on a 90 degree trip east. I"ve set the parking position at non home positions and it seems to work fine.
I"m curious if anyone is parking their CEM25 successfully at the home position?

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