No, that's the deal you accepted straight up. Is it what I would expect to happen without an arrangement between two courteous people? Not at all. But once you make an agreement, you stick to it. If you aren't clear on something, you straighten it out before anything starts.
@Blowfin, I realize the OP didn't cause anyone serious harm in the end. I also realize Futchy is absolute scum and I am in no way defending his intentions, his history, or his character.
However, he did come in here making a thread about common courtesy when he himself has shown absolutely none, while repeatedly attempting to vilify someone who hadn't done anything wrong in this particular scenario. Did Futchy have the best intentions? Probably not. In fact I'm sure he had horrible intentions. But he didn't trick the OP into doing anything. He said "You can lot on Tongues on our orb if you give us your shank", and the OP agreed to it. The OP did not, or does not, even know who Futchy is so it could have very well been anyone else that this happened to.
If someone says "I'll fight Alfard for you and let you lot Widowmaker if it drops if you pay me 10Mil", and someone agrees, kills the NM, and then warps without paying if the Axe doesn't drop, which person is the scammer and which is the scamee?
Edit: I still think we're missing each other.
Situation A: The OP is allowed to lot on the tongue with orb owner A despite it being YOYD.
Expected result: Orb owner A lots with OP on the OP's Shank.
Situation B: The OP is allowed 100% dibs on the first tongue.
Expected result: Orb owner A is given 100% rights to OP's Shank.
Yes, I believe these situations are a good deal. However, people are allowed to make deals that are not good. That does not mean anyone is being misleading. That simply means the person who takes the bad deal is an idiot.
Do I think the OP's deal was very fair? No. It was very one-sided. But, frankly, the OP shouldn't have agreed to it if that was the case. Even then, it should be mentioned that it was never explicitly stated that anyone but the OP would be lotting on Behemoth Tongues. The fact of the matter is that none dropped, and the OP left specifically because there was the possibility that 0 tongues would drop and he would still be expected to give up his shank because that was the deal.