Before upgrade version to 547, the purchase order is printed 1 page ONLY. However, now....
For example, see Purchase Order screenshot below. One item ONLY.
PREVIEW...it appeared 2 pages. See screenshot below.
SOLUTION
1. Open the Purchase Order format from Tools | Report Designer...
2. Click into SubRptNorm: Document_Detail
3. Click on the Report menu, see the screenshot below.
4. Untick the Page Style.