Yes, I am, though I admit that even with incomplete data one has to lack some logic to not see that the letter and the gate's chances of being a trap outweighted their chances to be real. Still, "every once and a while" isn't a very precise amount of time to set a pattern, you sounded pretty sure about a pattern of time existing. Did you mean something like "every end of the month"?

And we're not sure if it was the Malnosso, even if the gate has been a trap.