Robotic library re-insert on the different slot not working

I am new in Backup Exec 2012.

System details as follows

• OS: Windows 2008 server
• Robotic library :IBM 3572-TL
• I partitioned the tape library to 9 ( we loaded 8 data tape and 1 cleaning tape)

My requirements are as follows

• Mon back up move to Tape1 ( Not overwrite)
• Tue  back up move to Tape2  ( Overwrite after 4 weeks or  tape full )
• Wed  back up move to Tape3 ( Overwrite after 4 weeks or  tape full )
• Thu back up move to  Tape 4 ( Not overwrite)
• Fri  back up move to Tape 5 ( Overwrite after 4 weeks or  tape full )
• Sat back up move to  Tape 6 ( Overwrite after 4 weeks or  tape full )

All tape have bar code. Once I interchange the tape from slot 1 to slot 2, the back is failed with a message “Last append mode not found..”

I have the following questions

1. If I take the tape out and re-insert to tape library, is I have to insert on the same slot or I can insert to another slot of tape library?
2. If the job not finished after 1 hours of start time, is any method to stop the job?
3. If the tape is full, how I can configure a new tape? It is need any special configuration?

Thanks in advance.

Mathew