It appears this isn't an anydvd issue just look at the anydvd read out.

Summary for drive E: (AnyDVD 6.1.6.5)
BENQ DVD DD DW1640 BSRB 815025110810A U30508
Drive (Hardware) Region: 1

Media is a DVD.
Booktype: dvd-rom (version 1), Layers: 2 (opposite)
Size of first Layer: 2079072 sectors (4060 MBytes)
Total size: 3971795 sectors (7757 MBytes)

Video DVD (or CD) label: THE_NUMBER_23_URATED
Media is CSS protected!
Video Standard: NTSC
Media is locked to region(s): 1!

RCE protection not found.
DVD structure appears to be correct.
Structural copy protection not found.
Found & removed Autorun from Video DVD!
Bad sector protection not found.
Emulating RPC-2 drive with region 1!