Look on your machine for C:\Program Files\Autodesk\AutoCAD 2013\vaac_revblockimperial.dwg or metric if that's what you use. Open this file in Acad and do a block edit on the block of the same name. What should come up in block editor is the table being used for the rev block. In the Table editor, modify the style for this table and set table direction form Down to Up as the default. I would copy the file out somewhere first so that if it doesn't work, you can go back to a clean copy of the file.
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