access sequence working problem

Hi,

In IS-HER, in my system, pricing procedure is working different from normal SD process.

During fee calculation, system is going to access sequence, reading data for each sequence, writing all data to "pricing pocedure" and taking last value for calculation.

Normally I aspect that; to go access sequence, stop when find first value and to use first value for calculation. But system is working like I mentioned above.

Why? Is it normal?