Sigma EF-530 DG Super

[sourkraut]

I received a sigma ef-530 dg super for christmas and have a question about bouncing the flash. I'm hoping someone here has experience with this flash unit. When I tilt the flash head up, it goes into "bounce mode" but when I swivel the flash head it does not. Is this normal or a defect. The owners manual for this flash leaves much to be desired. Thanks in advance.