Anyone who makes a deal that includes 'right of passage' is incredibly foolish unless extraordinary high levels of trust already exist and the moves are enforceable by serious consequences of failure. Italy did not need an Austrian fleet in Greece to achieve its aims. An Austrian fleet in Greece was incredibly dangerous, seeing as Italy would not be able to dislodge it, should it be decided to hold onto Greece. Italy had no way of enforcing Austria to leave Greece. Why did Italy make such a boneheaded offer?
Anyone who makes that sort of bargain...or believes that the force will leave without inducement, is way too gullible to be playing this game. I mean, give me one good reason why Italy should abandon Con now...or ever. Will he really risk a force disband to foster trust?
Let's also look at the turn in question with the builds. Notice which of the three Austrian home centers was unoccupied. Now, Austria and Italy planned their moves for that season...Italy KNEW that Austria would get two builds (and if they didn't, they should have strongly realized it. No sane person would believe that Austria really would give up Greece). The only two centers that could be built in included Trieste.
Again, Italy made a stupid decision, and expected Austria to hamstring herself solely to keep an 'alliance' going, that never was more than an agreement to attack in the same direction, and to share the spoils.
I had more written here, but I've realized that you won't understand it at all.
I don't EVER expect my neighbors to trust me.
I expect my neighbors to recognize what is in their best interest, and, when that interest and my own coincide, to cooperate with me in reaching our shared aims.
At one point, Russia and I shared an interest in gaining Ank. Instead of doing what was in your own interest, you brushed me off, and went galavanting into my friend (which required a response in the form of Warsaw) and you also stopped your attack on Ank...which resulted in your failure to gain builds. The fault of that turn going against you was entirely your own.
Until you recognize that trust is not earned by talk, or by keeping agreements, but in the trust that the neighbor will do what is in his best interest, rather than his emotional feelings, you will always be flailing about, trying to avenge some petty slight from three seasons ago, instead of patiently building and scheming your way to the top.