Am I missing something?

Maybe I am just stupid, but if we are playing Beau Henry at 5/8, and that is what we bought him for, and Capewell is leaving us to go to Brisbane (who I assumed we had brought to be 5/8, but whether FB or 5/8, he's going apparently), then why wouldn't Zillman be playing at FB? Surely that is the plan for next year? SURELY!!!!

I'll admit I don't even bother trying to pick/guess teams anymore, but I still don't understand why we aren't playing the best players at their best positions and filling the remaining gaps as best we can.

We buy players to play in certain positions right? Or is this part of a "confuse the opposition" game? Hasn't been working very well so far, but the Titans and the fans are certainly dumbfounded.