Why does the routing give a non-ideal sequence?

Summary:

We are using the Optimization Strategy below since our field resources are working with zone ratios. The ratio itself is effective; however, I'm unclear about how the sequence is being determined. Please see the example below, where the activities are well-distributed and close to each other. However, the sequence/order seems less than ideal (for example, after E, F jumps to the next street; while next to E is AE and Q which should have been F, and so on).

How is the sequencing being determined?

Note that all these activities have accurate addresses, postal codes, along with x and y coordinates. How or where we can configure to include these parameters for more precise sequencing?