No need for Striking to be in on the whole thing. Stirking voted well in advance, and all Leth would have had to do was take advantage of that. Also, I doubt that the homunculi were specifically targeting Alphonse. I suspect they were just trying to make sure the lynch fell on a villager. Also, not sure why flawed logic, however flawed you may think it is, is actually good grounds for a lynch.
Cheese also hopped on for a double vote on Pyure actually, but I then changed my vote from Pyure to Cheese. So, there were three people who put a second vote on people: myself, Cheese, and Leth.
Pyure's comment does make me suspicious, but I'm not sure if he was goofing off with his roleclaim to me. What concerns me more is the whole "Sucks that the seer died" comment, which is actually a fairly scummy thing to say.