User Interface performance view

I'm looking for a few clarification how I should understand performance view on UI (Appian version 21.4)

1. Are all locals executed in sequence? In other words first marked section layout is constructed then second section layout is constructed? Both sections layout call store procedure and then display returned day

2. Total time is 33 seconds but when i sum up time for 2 selected section layout i get 43 seconds. How i should link total time with section layouts times

3. Similar to time - sum of percentages goes over 100% 

Above all - is it possible to call 2 stored procedure with different parameters in parallel?