Multi-monitor setup - screens swapped

[Wand]

Win7 host, WinXP guest, 2-monitors setup (laptop & external monitor), seamless mode.

After upgrading to VBox 5, it seems that VBox perceives monitor1 as monitor 2 and monitor2 as monitor1. Upon guest startup, 1 window opens at first and XP starts booting. After a while, when switching to graphical environment (during the XP boot process, just before the login screen appears) a 2nd window appears and the XP boot progress is shown in that window (the 2nd instead of the 1st). After that, the guest OS seems to treat the 2nd VBox window as the 1st screen and vice-versa. I enabled the mini-toolbar and set the 1st virtual screen to use host screen 1 but instead it used host screen 2. If VS1 is set to HS2, it works as intended but then if the guest is shut down, the external monitor is plugged-out and the guest is restarted, nothing is shown because in the laptop's monitor, the 2nd VS is supposed to be shown.

The "Display" of the guest shows as monitor #1 the laptop monitor and as #2 the external (i can tell from the different resolutions), however the contents of monitor 1 are shown in #2 and vice-versa.

Everything worked normally in VBox4 from which i upgraded the host and guest installations.

[Wand]

I don't know if it's related but the two different monitors seem to have a different color quality (the 1st has 32-bit, the 2nd 24-bit). When trying to change the 2nd monitor to 32-bit, it messes-up with the resolution and displays a message saying that the color quality cannot be changed due to an invalid resolution.

[Wand]

I guess this issue can be closed. I'm not sure what had changed in VBox 5.0 or what happened during the upgrade from 4->5 and forced the screen swapping but in latest VBox version, i finally set virtual screen 1 to monitor 1 and 2 to 2 and it now works almost fine. It seems i've come across an XP bug and the taskbar now appears in screen2 instead of 1 but that is a different story.