dvd+r dl is showing up as dvd+r

[gdm08]

when I put in a dual layer disk it is showing up with the wrong info and it will not burn right.... this is what shows up when I put a DUAL LAYER disk in the drive

HL-DT-ST DVD-RAM GSA-H55L 1.06 (ATA)

Current Profile: DVD+R

 

Disc Information:

Status: Empty

Erasable: No

Free Sectors: 2,228,225

Free Space: 4,563,404,800 bytes

Free Time: 495:11:50 (MM:SS:FF)

Supported Write Speeds: 2.4x

 

Physical Format Information (Last Recorded):

Book Type: DVD-ROM

Part Version: 0

Disc Size: 120mm

Maximum Read Rate: 2.52Mbps

Number of Layers: 1

Track Path: Parallel Track Path (PTP)

Linear Density: 0.267 um/bit

Track Density: 0.74 um/track

First Physical Sector of Data Area: 0

Last Physical Sector of Data Area: 0

Last Physical Sector in Layer 0: 0

[LIGHTNING UK!]

Can the drive read any other DL discs ok? like originals or ones you've already burnt?