While I have heard that there can be dispensations for reception, they are exceedingly rare, must be cleared by the bishop, etc.
Sounds more like your priest is feeling his ecumenical oats.
Some of the worst liturgical abuses and bad cathechesis I have experienced comes from some of the nicest priests, nuns and other religious. They are charitable, kind, thoughtful, well-read, well-spoken, and full of good intentions. . .but they make terrible, terrible mistakes.
I’d tell the priest that, while you respect him personally, you really are concerned about proper reception of a sacrament. If he tells you not to worry or gets huffy, I’d go on to the bishop. If he tells you that he consulted his bishop and followed proper procedure, that’s a little more reassuring. Even if the bishop was wrong (they can be), it wouldn’t be the priest’s fault, or anyone else’s.
And you’re not being petty.