No problem. Glad to help. I've done the same thing myself a few times assuming that the source material on the internet would be error-free.

About the numbers though - that's a general rule of thumb. But the rules can change depending on who the audience is and the formality of the writing. For example, when I submit articles to scientific journals, some require numbers <10 to be written out - others require numbers <20 to be written out

@weesin thanks for the suggestions. they were very helpful!
I did mean "Mayans," and I didn't know that about numbers. I copy-pasted the quote from the internet, and I didn't read it as thoroughly as I should have.

I believe you mean 'mayans' not 'mayas'. Also, there is inconsistency in your quote. At times, you type out the word 'zero' - other times, you use the digit. As a general rule of thumb, numbers <10 should be written out