Check your model dimensions to determine if those with "run-on decimal places" 1) are weak dimensions, or 2) have a geom check in the feature, or 3) are in an old model, are strong dimensions, but may have been sketched without Intent Manager turned on. Any of these three have been seen to cause dimensions to carry 13 significant digits. The "Rounded Dimension Value" checkbox masks this, but is counter to the long time definition of driven dimensions, that the geometry and dimension number shown should match exactly <exiting soapbox>.