Backup on two tapes instead of one (BE 2012)

Hi guys!

I have an odd issue with Backup Exec 2012.

This is how my backup environment look like :

• 1 LTO-3 TAPE DRIVE With a 8-tapes loader. 
• Backup Exec 2012 (full patched)
• Rentention of 1 week (6 days)
• Append time of 12 hours
• 5 servers to backup
• Ratio of compression between 1.75-1.85 on each tape
• Schedule : all backup jobs begin at 00:00

The 3 servers are backup on 1 tapes, the 2 last on an other tape.

The 1 tape still have 100Go free space and on the 2nd tape, only 36Go are used.

The compression ratio is around 1.75, So. The tape 1 should have enough space for the 2 last servers.

My append time should be ok! The last backup end at 6h00AM.

I included all screenshots for helping you to understand

Can you help me on this guys?

Thanks!