Why does Moses grill leavened bread on Yahweh's altar?

Question

Continuing the response to the meta call for contradiction.

In Exodus 34:25 we read this injunction:

You will not slaughter the blood of my altar on leavened bread ...

This injunction is repeated in Leviticus, Lev 2:11

All the comfort offering which you will sacrifice to Yahweh, you will not make of leavening. Because of all yeast and all honey, none will not be firy grilled for Yahweh.

Yet, in Leviticus 8:25, we find the following passage:

And he took the fat and the tail-fat and all the fat which is on the offal, and the extra on the liver, and the two kidneys and their fat, and the right thigh. And from the basket of crackers which is before Yahweh, he took one cracker-cake and one fat-bread loaf, and one cracker-bit, and he put on the fat and on the right thigh. And he placed the whole in Aaron's palms, and in his sons' palms, and he waved them as a wave-offer, before Yahweh. And Moses took that from their palms, and he grilled it on the altar over the raised offer. They were fulfillment, for a comfort smell, firy, it is for Yahweh. And Moses took the breast, and waved it a wave-offer before Yahweh, from the fulfillment ram. A portion was for Moses, as Yahweh commanded Moses.

Moses is grilling a fat-bread loaf (Heb: וְחַלַּת לֶחֶם שֶׁמֶן). This is taken from the bread offering permanently before the altar, and there is a detailed description of its content, and there is no doubt that this is leavened stuff that Moses is holding.

But Moses proceeds to grill it over the raised offer. Is Moses immune from following the unleavened commandment?

Answer 1

There are many ways to make “bread” that do not involve leavening but are still called lechem (לחם). The sort called matzoh (מצה) is made of flour & water kneaded into a thick dough and baked. The sorts called “oiled bread” and “wafer”, lechem shemen (לחם שמן) and rakik (רקיק), are made differently, but with no indication that they are leavened in any way. When leavened loaves are called for (in the thanksgiving offering, or on Shavuot) it is done explicitly.

The Talmud, as quoted by Rashi, described the “oiled bread” as being made with flour kneaded with scalding water, not leavened, baked and then fried in oil. This final product no longer looks like a matzoh loaf; presumably that’s why it is not called by that name.