Expense report approval workflow based on amount limits and hierarchy level

Summary:

I am trying to setup BPM approvals rules for the approval to go to a higher level management based on amount limits, but the approval request either goes in a sequential order to every manager of the 3 levels, or doesn't go to anyone.

Content (required):

I have 3 rules, 1) expense report totals = or less $2000 have to go to the direct manager of the person submitting the report, 2) if expense report totals between $2001 and 10000 need to go to the manager of higher level, and 3) if expense report total is over $10001 it needs to go to 3rd level manager.

Problem: When setting up these rule in ExpenseReportRuleSet, the flow follows a sequential order, i.e if the report amount is 15000, the system requires the approval from all managers one after another - which shouldn't be the case, the approval only has to go to 1 manager based on its approval limits.