.
Why? If you mean because you used the singular "one" and coupled it with the plural "their" that is a pish tosh. I understand what you mean. Isn't that what matters here? Even though I was an English major GJ I don't have a steel rod stuck up my a** and jump on folks for improper spelling or syntax or word usage. It simply does not matter at all. For those who make a big deal about it I only have pity that their lives are so bereft of meaning they have to "correct" others to feel significant. OK. I'm off my soapbox!
That's that! :)
