using Copy-PWDocumentsBetweenDatasources appears to set the datetime stamp for Create and file update as 8 hours off. Example: source create time = 2/19/2003 5:28:03 PM and the target after the copy process = 2/19/2003 9:28:03 AM.
I did test out with a copy/drag to both sources a file and the timestamp is correct so it is not the server time that is the problem.
is there utc option that is not being account for? PST settings?
What version of PWPS_DAB are you using and what version is your servers?
There was a fix for a date/time issue back in 184.108.40.206, but that was a while ago. also current servers keep date/times in the databse in UTC and convert to local time on display, but if you have an older server that doesn't support that then the date/times are stored in the timezone the server uses and maybe the script is adjusting them thinking they are in UTC.