Can't move a new slide around in template.

I've created a new template and inserted a slide (1.13) that I want to put between 2 other slides (1.12 and 1.14) inside. Although the slide numbering is appearing correctly and in the preview I see the new slide in the correct order, the navigation control skips this page, that is when I click the next button at 1.12 it goes to 1.14 and completely skips 1.13.

What could I be missing? my client is using Articulate 2 Update 1 version.

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