When choosing pages to stage over the selection will be inconsistent

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.0.12 EE, 6.0.X EE
• Fix Version/s: 6.0.X EE, 6.1.X EE, 6.2.0 CE B1
• Component/s: Frontend Infrastructure, Staging
• Labels:
  • QA-R
  • QA-TP
• Environment: LIFERAY VERSION: 6.0 SP2 ; OPERATING SYSTEM: Windows Server 2008; APPLICATION SERVER: JBoss 5.1 ; JAVA VIRTUAL MACHINE: Java 6; DATABASE: SQL Server 2008
• Branch Version/s:
  6.1.x, 6.0.x
• Backported to Branch:
  Committed
• Story Points: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/1652

Summary:
change selection pages results in different pages will be chosen

Steps to reproduce:
1) Grab a brand new 6012 bundle
2) Go to Control Panel -> Pages -> Settings -> Staging -> Enable "Local Live" Staging
3) Add pages as following :
.p1
----s11
----s12
.p2
----s21
----s22
.p3
----s31
----s32
4) Publish to Live -> Change Selection -> i.e. select all pages -> Select

Result : Inconsistent pages were chosen.

Note:
6.0.x and trunk also have the similar issue, which after clicking on "change selection", the selected page and the page tree are not consistent.