LU: Be aware that a person can be a great speller and still misspell words. The brain can actually trick people into thinking a word is spelled differently than it actually is because it “knows” what the word is supposed to be. Immediate proof reading very often won’t help in such a case, but may help when the writing isn’t freshly written and the words ingrained.
If there was only one spelling mistake and you think he actually wrote the resume himself, he’s probably better at spelling than the ones that have perfect resumes written by others.
And here’s my two cents of advice: since you consider yourself Jewishly educated, you’ll have a much harder time respecting an Am Haaretz than a bad speller. And for most people, spelling can be improved much quicker than lack of Torah knowledge, especially with spell-check.
I’m not saying that guy was right for you, but choose your spouse wisely. In the scheme of life, there is so much more that you can/should respect in a husband than proper spelling. And unless you plan to mostly communicate by text it’s almost a non-issue.