MarketPress3 Variation/Attribute Options Are Not Saving Values As Entered

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The attached screenshots depict a sample product that has a 'size' Variation. In this example, I've entered: Extra Small, Small, Medium, Large, & Extra Large, as the options assigned to the 'size' Variation. When saving the Variation, the values of some options appear to be displaying the ID of the option instead of it's text value that was entered.

Sometimes the values entered are display correctly, sometimes they don't. No special characters, prepending spaces or appending spaces are being entered. The issue happens when editing existing products and adding new products. I cannot seem to determine any sort of pattern that causes this.

Why is this happening?