Hello,
1. Check in SWI5 if the workitem is in that user's inbox. If it is, then the wrkitem is there, you just have to find it. Maybe a refresh?
2. Don't trust the graphical log, check the Chronological log to see if the step was executed.
If it wasn't then activate the template, do SWU_OBUF and start the workflow again.
regards
Rick Bakker