iPad and Meta tag: Meta tag not being included in index.html

We have a new project that we're publishing to HTML, that's intended to be viewable on an iPad. We set the page size to 1024x690, but when we published it to try it out, we noticed that some of the content on the right and bottom was being cut off. I compared the published content to the background image (also 1024x690) and found that the published site is being stretched on the iPad.

Looking at the index.html container file that was published, it doesn't have the following Meta tag that we included at the top of our title:

If I manually paste that into the index.html file, then the page is no longer stretched.

Any ideas on what I might be doing that's causing the stretching, or how to get that meta viewport into the index.html?