Priority Configuration (refer to Selection_010.png):
Strategy: Absolute
Number of Priorities: 10
Default Priority: 10
Only Admins can edit Job Priorities: selected

Priority Job Group Configuration (refer to Selection_011.png and Selection_012.png):
Jobs to include: Jobs and Folders marked for inclusion
Job Group Name: Priority2
Priority: 2
Jobs to include: Jobs and Folders marked for inclusion
Job Group Name: Priority5
Priority: 5

Jenkins freestyle Job1:
Name: Priority5
Input String parameter name: trigger
Include this job in a job group: Priority5
Build Step: sleep 600

Jenkins freestyle Job2:
Name: Priority2
Input String parameter name: trigger
Include this job in a job group: Priority2
Build Step: sleep 600

Steps to reproduce:
1. trigger Job1 (Priority5) with trigger=1
2. trigger Job2 (Priority2) with trigger=2
(so both jobs are running with sleep 600 seconds)

3. trigger Job1 (Priority5) with trigger=3
4. trigger Job2 (Priority2) with trigger=4
5. trigger Job1 (Priority5) with trigger=5
6. trigger Job2 (Priority2) with trigger=6
7. trigger Job1 (Priority5) with trigger=7
8. trigger Job2 (Priority2) with trigger=8
9. trigger Job1 (Priority5) with trigger=9
10. trigger Job2 (Priority2) with trigger=10
(these jobs are waiting in the queue)

Expected results from queue:
the jobs in the queu should be sorted into 2 groups,
where Job2 (Priority2) goes first and Job1 (Priority5) goes behind.

But the actual results from the queue (refer to Selection_009.png):
The jobs are sorted acoording to the time when the job was triggered.
(the same order sequence as how the job is triggered)