I've never let them stay that long...I've only been indoors for a little over a yr. As soon as I see male sacks I get rid of it. I agree about being able to tell in veg...thats when I check mine. My males are gone before I flip to 12/12, I wait for the preflowers. What I meant is I have never seen multiple sacks or clusters in veg...not saying it can't do it, maybe I don't wait long enough. I usually keep everything until the fems show pistils. It has been my experience that the males show first and I usually have them off to one side. A week or so later the ladies show and when they throw pistils, and the ones that I thought were males have not...and had pre-flowers a week longer, I pitch them. This is only my experience with the strains I have grown.
My logic in this is if this thing has been like that for 2 weeks and not shown pistils and the rest have, then it's probably a male, but by all means hang on to it to be sure if you have the room. I would tell everyone to hang on to a male until they are posotive what it is...if nothing more than for them to be sure, and know what they are looking for the next time. Man they are sure calyx shaped that is what threw me off at first, but when Llama said they have been like that for 2 weeks, well it should have shown pistils by now...IMO.