As is always the case whenever this happens, the following sequence of events produced the problem:

1. Node is posted in the wrong section (Perl Monks Discussion)
2. Node is moved into correct section (Seekers of Perl Wisdom)
3. Node is approved

If the events occur in exactly that sequence, the node gets approved into Perl Monks Discussion, as things are. The correct way (that is, the way to do things without this error occurring) is the following:

1. Node is posted in the wrong section (Perl Monks Discussion)
2. Node is moved into correct section (Seekers of Perl Wisdom)
3. Page is reloaded
4. Node is approved

In most cases, a short notice to a janitor or to the people in the CB should be enough. Any janitor or god then can unapprove the node from the original section and then the node is free for reapproval, but now already sits in the correct section.