When one crops a document, the "Apply to:" dialog preference selects between "Even and Odd Pages", "Odd Pages Only", and "Even Pages Only". This preference is sticky, based on the last document that was cropped. In practice, documents are uncorrelated.

To minimize user errors, Acrobat should default to a single choice users expect, "Even and Odd Pages". Or inspect the document, or at least notice whether one is on an even or odd page.