There were two other opposite-sense adjustment on July 19 and August 16 but it was somewhat less in magnitude than the one in 2007 June. On looking back to the start of observations, there have been several minor retrograde orbital adjustments but they appeared only as 'noise' within the assumed error bounds of the observations. With hindsight - they are visible in the data but are not obvious in the plot at the scale used on the web page.