very confused - syntax question

It was bound to happen sooner or later - I have thoroughly confused myself
with my own syntax.
Here's the deal: only a topic or an agent/experiencer can be a subject.  So
if the originator of the action is not an agent/experiencer per se, the
patient is topicalized/focused (I recall we discussed the difference, but I
don't quite recall the discussion), the verb is put is the middle voice, and
the originator of the action is assigned another appropriate role, such as
benefactor.  This is the case for the verb "kanyan," "to win," where the
patient is topicalized and the "agent" is a benefactor.  So far, so good?
Here's the problem: for purposes of word order, the benefactor is not an
object, or is it?  Can a verb still be transitive when the subject isn't the
originator?
Here's the phrase that got the whole mess started:

ta rusa-k@-mi siu na a-kanyase ko kanyan-al-ena inya kah
with brother-pl-my two that the-prize TOP.past won-middle-they.resumptive
they.resumptive BEN
with my two brothers who won the prize

Should "kanyan" be inflected for third person plural?  I hope I've made
myself at all clear, because I don't even know what I'm saying/asking.

very, very, very confused (and a little frightened),
Jennifer


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