"So, In a community property state (California), where only one person got unemployment of $25,000, ProSeries is changing it to $10,200 deduction for each spouse even though only one spouse was unemployed."

That is the correct adjustment.  
https://www.irs.gov/forms-pubs/unemployment-exclusion-update-for-married-taxpayers-living-in-a-commu...

I decided to LOCK my returns after they'd been accepted, that way the software doesnt make any changes for updated tax laws until I unlock the return....Im able to open the return and see exactly how it was filed.  Then I can unlock when Im ready to deal with any tax law changes that may have happened since filing.   

Any returns you havent opened since they've been filed, you can lock right now, might not be a bad idea.    Highlight the file in HB then hit Tools > Lock Clients