Widow and Orphan control is locked

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The setting will not decrease down to 1 because you need at least 2 lines to decide whether to split or not the paragraph across a page break.

If you don't want widow and orphan control at all, uncheck the boxes, this disables the feature.

In your question, you didn't tell where and how you checked/unchecked the boxes. This is a property of paragraph styles. Consequently, if you don't act on the adequate style, it has no effect. You have 2 ways to disable widow/orphan control, but you must first ensure that your trials won't have adverse consequences because of style inheritance. For that, open the Text Flow tab of the style you played with and press Standard button, then OK

• Global disabling

  Uncheck the boxes in Default Style.

• Disabling for text only, excluding headings and indexes (TOC, Indexes, bibliography)

  This assumes that your text is styled Text Body as intended by design.

  Uncheck the boxes in Text Body.

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