Question about instrument number 17

I need a pizzicato cello as my 17th instrument so I inserted this into my Kontakt multirack.  On track 5 (a legato violin part that uses MIDI Channel 5) there is a section that is vacant at bar 85.  So I created track 17 for the piz cello that starts at bar 90 and goes for 15 bars - the violin part doesn't return.  So, essentially, two different tracks with two different instruments sharing the same MIDI channel.
 
In Kontakt, on the instrument panel, I assigned Pizzicato Cello to "st.17 [2 ch. routed 33/34]" and the MIDI channel to "[A] 5" - obviously Channel 17 doesn't exist.  In Sonar, MIDI track 17 is assigned to "5:Koontakt 64" - Kontakt's channel 5 (I renamed my "Kontakt 5" Synth to "Kontakt 64" to avoid the 3 Kontakt 5 outputs confusion) and the corresponding Audio track, Track 33 is assigned to "kt.st.17 Stereo".
 
However, both tracks 5 and 17 are playing both instruments.  Where is my error?  How do I get track 5 to play just legato violin and track 17 to play just pizzicato cello?  Neither instrument is overlapping.  How do two instruments share a midi channel?   

As I know 2 different instruments cannot share a MIDI channel.
For 17 ... 32 you need a second instance of Kontakt.

Thanks Greg.  All I see are patch options of 1-127 on Bank 0.  Do you know where I should look to find the number for my pizzicato cello?  Where I assume patch number 0 is has my top instrument "a-violins 1" but the rest are just numbers.  Is this a Kontakt thing or a Sonar thing?    

It's funny after all these years I've never figured out how to insert a patch change in the middle of a song. 
I would think the event list would be where I might do this but PG don't seem to show on the event list. 
Myself I just would use a second instance of the player. 
 
I know I get downloaded midi files that have PG changes mid song and TTS-1 seems to have no problem. 
They show on the track pane but I've never figired out how to edit them. I end up opening the song in another sequencer where they show on the event list. 
Sonars patch changes are all handled in the track header as far as I can tell and there is no other options. 

Thanks, that seems to answer the OP's question as well.