I assume you're referring to the previous and next links under each individual sheet? Those are definitely not being linked manually - that would be an absolute nightmare to maintain. The issue you were seeing was caused by the sheets having the same name which yielded inconsistent results when sorting. I've now added an additional unique column to the select which should result in the same sort order every time. My quick testing shows that the links between sheets now function as expected.
Thanks for the report!
Thanks for the report!