multiple instruments on mixer channel

Forgive my inexperience, I tried looking for this in the manual, but couldn't find it. (I may have been looking right at it, but it was the proverbial snake!).
I use Notion SLE w/ GPO4. Windows 7 32 bit, (not optimal, I know).
My piece uses 24 instruments, some are doubled, ie; clarinet 1&2 on same staff.
When using the mixer, and soloing violin 1, I also have one of the FH staves audible.
1) Am I doing something wrong?
2) Can this be avoided?
Please let me know if any more info is needed to help. Thanks in advance.
Tim
I use Notion SLE w/ GPO4. Windows 7 32 bit, (not optimal, I know).
My piece uses 24 instruments, some are doubled, ie; clarinet 1&2 on same staff.
When using the mixer, and soloing violin 1, I also have one of the FH staves audible.
1) Am I doing something wrong?
2) Can this be avoided?
Please let me know if any more info is needed to help. Thanks in advance.
Tim