Help please...story is submitting results before clicking on the submit button

I've created a project using Storyline 2, for some reason my "incorrect" layer is being triggered whenever I use the letter "e" key or the submit button.  Unfortunately this triggers the answer check too early if there is a letter "e" in the answer.  Any help is greatly appreciated (I've attached my story file).

For example:  The word "heptane" should trigger a correct response, but the letter "e" triggers the check early.

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