I don't think the Jefra boot was "dumb" either, but when Spencer was available as a choice, it didn't make sense to me. Jefra made another commitment to the alliance of 5 last week. He could have had Trish flesh out any insecurities in her. But, he constantly discounts Trish and keeps her out of the loop, while Woo is seemingly in the loop. We know that Trish and Tony must talk. The girls will be so much easier to beat when it comes to final challenges, imho, at least most of them (except Tasha!).
Yes, the girls could have gone with the "all girl" alliance and taken control. I agree that was a valid option they ignored. They clearly don't trust each other enough to do it. Jefra/Kass/Trish don't trust Tasha enough, nor does Tasha trust them enough. They all know that Tasha's closest ally in the game is Spencer, therefore it's understandable why it wasn't taken seriously.
Tony is bent on getting people out that in his view are not playing the game. He called Jefra a goat to her face last night. Clearly, Jefra did not read the writing on the wall, which should have been enough for Tony to prioritize Spencer over Jefra as well.
Just isn't logical thinking to me. I agree with CTGirl, Tony's mania is running circles around everyone else, but will it be his demise in the game as well?