Media Access port already contains media

Having a weird error every now and again over here, when ever I try to export tapes from my library (Spectralogic T120) I get the error,"Media Access port already contains media"

What's weird is that I'm able to update the inventory on the library and it displays correctly. 

I ran a /scan and I see 9 MAP slots (WHICH IS WEIRD BECAUSE IT SHOULD ONLY HAVE 8)

Device Identifier: "SPECTRA PYTHON          91180056CF"

Device Type    : SDT_CHANGER

NetBackup Robot Type: 8

Removable      : Yes

Device Supports: SCSI-3

Number of Drives : 4

Number of Slots  : 95

Number of Media Access Ports: 9

Any ideas how I'd go about troubleshooting this ?