Seriously, it seems like I’m always getting words my Google Chrome spell check doesn’t recognize. Yet, if I go to Google home page and try to look up the word myself, Google gets it no problem.
For instance, my Chrome doesn’t recognize the ‘dytopian’ or ‘carnitas’.
Both those words are spelled right but the ONLY suggestion I get for dystopian is “utopian” and the ONLY suggestion I get for carnitas is ‘Itasca’ (Whatever the hell that is).
Does anyone else have this issue?
Congatulations! You installed the joke. 
Funny that you wrote dystopian, which is spelled wrong.
Anyways, if you want to use the Google engine for spell check, you can. It’s in the options, perhaps only after advanced.
As for why it’s that way? Spell checks dictionaries generally just take a list of the X most popular words. Dystopia didn’t make the cut, apparently. It doesn’t in Firefox, either, although carnitas does (unless I added it to my custom dictionary in the past, which, BTW, is what you should always do if you see a real word underlined–after you’ve confirmed it is indeed spelled correctly.)
To me, what sucks about spell check (in Firefox at least) is the poor predictive powers of what words you mean. That’s more important than a too small dictionary, in my opinion. It’s why, even with spell check, my mom constantly has to ask me how to spell words.
Yeah I hate it, it always wants to swap around the re in centre, metre etc and don’t get me started on colour, odour etc!!
Well, that’s because you’re using the wrong spelling dictionary. Chrome comes with the American dictionary (at least, if you get it form the American website), but you can change the language if you want: How to add dictionaries to Google Chrome's spell checker - gHacks Tech News