There should be no dilemma about the spelling of dilemma. It’s not dilemna, and it’s a mystery why so many people were taught that way. This is part of a complete episode.
In parts of the South, it’s not uncommon to end a sentence about a dilemma with the word one, short for one or the other, as in “I’m going to quit my job or get fired, one.” This is part of a complete episode.