You have the correct stuff, 2ndChoice. "Glycerin" (sometimes referred to as "glycerine" as well) is the actual name of the chemical. Some manufacturers label it "vegetable glycerin" to explicitly state that it was not produced as a waste product of another industrial process.
Seeing "USP" on the label is the key. This states that it meets the USP monograph from a composition, characteristic (smell, color, density, etc.), and purity perspective.
Food Grade is a lesser rating that falls under "FCC" or Food Chemical Codex. By definition, any Glycerin that is USP can also be labeled as "Food Grade" because USP is a more stringent standard than food grade (or FCC). It is a marketing thing. Just as we look for "USP" for vaping purposes, people who are actually using it to make food products (Eeee ghads!) want to see "food grade" on the bottle, or they won't buy it.
So... Chillax, and vape your face off... Its all good...