i'm doing the following actions ->
1) i have a multicam sequence loaded into the record monitor and empty source monitor
http://djfio.ru/my-content/mcambug/mc1.jpg
2) i doubleclick the !!BG.mov clip higlighted in the bin to load to the soure monitor
http://djfio.ru/my-content/mcambug/mc2.jpg
3) then i press the key-shortcut to enter m-cam nine-split mode
http://djfio.ru/my-content/mcambug/mc3.jpg
4)and then i exit the m-cam mode to the normal edit mode
http://djfio.ru/my-content/mcambug/mc4.jpg
so after these actions MC ends with the seuence loaded to the both monitors
but i need clip !!BG.mov loaded into the source pane.
it disappears everytime when i load a simple clip into the source monitor.
but it doesn't when i load there a matte-key clip or i press (T - select all in-out, alt-c - copy to buffer) after step 1.