פירוש על עבודה זרה 13:5

Huna (who did not rebuke R. Abba) could respond that there is no order to the Mishnah. Perhaps the anonymous statement was issued first.

Huna here clarifies his opinion. There is indeed order within a tractate, but there is no order between different tractates. Thus, if there is a dispute in Bava Kamma and an anonymous opinion in Bava Metzia, the halakhah does not necessarily follow the opinion in Bava Metzia.