Right Click+W moves character towards unexpected direction

Time: 2013 09 10 around 11:30 am GMT 0

Frequency:
Always

World name:
Cerberus

Character name:
Soul Pierce

Class/Level:
Archer(Bard) 50

Party or solo:
Solo

Area and coordinates:
Coerthas Central Highlands->Dragonhead 24X 20Y

Steps:
1. Turn camera at angle (while holding mouse left button) so it is facing different direction then the character
2. Push down and hold Mouse Right Click
3. Start moving by pressing "W" while holding down Mouse Right Click.
4. Character start to move towards the direction he is facing, when expected behavior with "right click"+"W" is character moving towards direction where camera is facing.

Connection Specs
- Type of internet connection/provider: TEO
- Modem maker/model number: TP-Link TL-WR1043ND

PC Specs
-=-=-=-=- System Information -=-=-=-=-
Time of this report: 9/10/2013, 12:00:22

Operating System: Windows 8 Enterprise 64-bit (6.2, Build 9200) (9200.win8_gdr.130531-1504)
Language: Lithuanian (Regional Setting: Lithuanian)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 02/24/10 14:02:48 Ver: 08.00.15
Processor: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (8 CPUs), ~2.7GHz
Memory: 6144MB RAM
Available OS Memory: 6136MB RAM
Page File: 5429MB used, 1665MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.02.9200.16384 64bit Unicode

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Browser Information
- Name and version of the browser currently in-use: IE 10
- Internet Explorer Version: IE 10