From the FAQ
When I returned my results and got a new work unit, why were the "Data units completed" and "Total computer time" values not updated?
When we receive the results of a completed work unit at our server, it is transferred to a separate computer for processing. There may be a delay of up to a few days before the results are assimilated and verified. Your credit is updated only after verification of the work unit results data. Once the server has updated your statistics, your computer will receive the revised values the next time it connects to the server. This means that your displayed statistics will generally lag behind the work actually done.
http://setiathome.ssl.berkeley.edu/faq.html#q27
Patience I guess