So you have a data set with a row for each Region - TaskType pair, and a summary data set with a row for each Region. The TaskTypes are sequential, so no subsequent task should be started before the previous task is complete. Is that correct? If so, what are you trying to do with those data sets? Are you joining them? Are you trying to recreate the summary based on the first data set?
Also, could you also try to explain where you are seeing this site in the wrong phase? If it is in a table / chart in Tableau, you can right-click on the mark and select "View Data". If you switch to viewing the underlying data, you can see exactly which row(s) of your data source were included in the aggregation to obtained the selected value.