Hi Katherine. Capturing event information (such as the date an Issue was approved and by whom) is a tricky challenge. The technique I normally use is to set up a calculated custom data field to "trap" what I'm interested in when it happens. In this case, using an IF statement, I'd compare the Previous Status against the Current Status, and when the state I'm interested in occurs I'd "grab" the Last Update Date and Last Updated By (respectively); otherwise (e.g. if the condition I'm watching for has yet to occur) leave the target alone.
Regards,
Doug