Not really missing anything. That's how preview works. It's like preview assumes you will use the records being browsed option when you print. To eliminate this, you can isolate your record in a found set of one record (which is a safer way to go IMO anyway) before switching to preview mode.
I used Omit record and show omitted only to isolate the record. All is well. Thanks Phil.
That's the method I use on single user files.
Thanks to a post by LaRetta, I've learned that in shared systems, there's a small chance that the Omit/show trick will pop up an extra record if someone else on the network managed to create a new record at just the wrong instant in time. Peforming a find for the current record's primary key is thus a safer method in cases where you might have this occur.