The space is appearing because the text is inside the Content Control but the paragraph mark is not.
You could remove the trailing paragraph marks to position all three CCs consecutively in the same paragraph (only one appears at a time)
Or
Convert the plain text CCs into Rich Text CCs which do allow the paragraph mark to be inside the CC.

The way you do it in your final doc depends on the layout you are trying to achieve.

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Andrew Lockton
Chrysalis Design, Melbourne Australia