You seem sure the report width + margins does not exceed the width of the area that your printer can cover, so maybe:
- you inserted a page break
- you have set Keep With Next property in such a way that records are being divided (no image of report in print preview so just guessing)
- 1 or more of the bottom controls is expanding onto page 2 yet the control has no visible data (invisible data could be line feeds)
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.