I apologize because I must really be missing something here. The gemora is concerned with why R' Yehuda doesn't pasul if he had machshava liten es ahanitanim l'mateh, l'maaleh. Why isn't the gemora just as bothered with the Rabonon - isn't this a classic case of machshavas chutz l'mkomo? Tosfos only asks this by the next question of the sha"S, Hanitanim bachutz bifnim. Why isn't Tosfos bothered by the exact question in the previous case? And if the gemora simply holds that our Mishna holds shelo b'mkomo k"mkomo dami, why does it have a problem with R' Yehuda holding that and ask on R' Yehuda? And further compounding my confusion - why doesn't the sugya on 26b/26a even try to bring a rayah from our Mishna to Shmuel (and Reish Lakish) that shelo b'mkomo k'mkomo? What am I missing??

Yzf, Toronto