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I think you want "Options / Space Units". Increase the "Precision"; max is 10.
OK, now I understand. I really don't know the answer, but there are two places that you could try.Click on "Options" in the "Selection Info" palette. Increase the value for "Maximum number of entities to show".Go to "Options / Preferences" and increase the "Undo/Redo depth".Maybe changing one of these will do something.