A Change of Meaning

I went looking for Zachariah 2:14 in my Bible and couldn't find the verse. I finally located the verse in the Jewish Publication translation. It seems as if every Hebrew Bible contains the verse and all the Christian versions either omit the verse or don't think it belongs.

Which version is accurate? Or are omissions a natural occurrence?  Are some words left out or included because they buttress an opinion?or am I not looking in the right place?

• How often do we delete or add words? All the verses were there just in different places. How quick I am to make assumptions.