It looks like cold damage. This can show up weeks after being exposed to cold. How cold was it when you brought it home?

This is actually how large Aroids grow. Aerial roots grow in the crease between the oldest leaf and the stem. When the plant becomes taller (or longer, I should say) this will become more evident. The oldest, tiniest leaves naturally yellow and die, however I find this takes longer for M. Deliciosa (another large around, if you're familiar) than many of my other plants. If you are fertilizing, the white residue could be from that, or if you have hard water it may be from that too. Picture is a little unclear, but it doesn't look like mold to me. How did the roots look when you repotted? If they were brown or squishy, it could be rot caused by cold damage as suggested above.

Wow thanks for the advice!

Overall the plant looks pretty healthy albeit for the leaves looking somewhat closed. I did bring it home when it was somewhat chilly (~35 F) and it was sitting in the car for about 2 hours. When I repotted, the roots were white, firm, and healthy. Other than the two dying leaves, the plant seems fine overall and I've had it for almost a week. I'm just worried that the leaves are a precursor to the health of the rest of the plant. Here's a picture of the rest of the plant for reference:

There are three spots that tell me cold damage, you will probably lose these leaves. Do you see the darker areas? Do me a favor and push on them and see if they are firm or soft. If soft they probably will be lost, if not maybe they are shadowed.

Glad it was just a trick of the light. :)