Possibly a bug in Keil Simulator

Hello guys,
I'm trying to simulate this simple code with Keil UV4..

//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------

#include <C8051F360.h>


//-----------------------------------------------------------------------------
// Global Constants
//-----------------------------------------------------------------------------

#define SYSCLK    24500000             // System clock in Hz

//-----------------------------------------------------------------------------
// Function Prototypes
//-----------------------------------------------------------------------------

void OSCILLATOR_Init (void);
void PORT0_Init(void);
void PORT1_Init(void);
void PORT2_Init(void);
void XBar_Init(void);
//-----------------------------------------------------------------------------
// Global Variables
//-----------------------------------------------------------------------------



//-----------------------------------------------------------------------------
// main () Routine
//-----------------------------------------------------------------------------
void main (void)
{
   PCA0MD  &= ~0x40;                   // Disable watchdog timer
   // Initialize Port I/O
   PORT0_Init();
   PORT1_Init();
   PORT2_Init();
   XBar_Init();
   OSCILLATOR_Init ();                 // Initialize Oscillator

   while (1)
   {

   }                                   // end of while(1)
}                                      // end of main()

//-----------------------------------------------------------------------------
// PORT_Init ()
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
void PORT0_Init ()
{
        unsigned char SFRPAGE_save = SFRPAGE;      // Save the current SFRPAGE
        SFRPAGE = CONFIG_PAGE;              // Switch to the necessary SFRPAGE
        P0MDOUT   = 0x0E;
        P0SKIP    = 0x0F;
        SFRPAGE = SFRPAGE_save;             // Restore the SFRPAGE
}

void PORT1_Init ()
{
        unsigned char SFRPAGE_save = SFRPAGE;      // Save the current SFRPAGE
        SFRPAGE = CONFIG_PAGE;              // Switch to the necessary SFRPAGE
        P1MDOUT   = 0x3F;
        P1MDIN    = 0xFF;
        P1SKIP    = 0x3F;
        SFRPAGE = SFRPAGE_save;             // Restore the SFRPAGE
}

void PORT2_Init ()
{
        unsigned char SFRPAGE_save = SFRPAGE;      // Save the current SFRPAGE
        SFRPAGE = CONFIG_PAGE;              // Switch to the necessary SFRPAGE
        P2MDIN    = 0xFC;
        P2MDOUT   = 0xFC;
        P2SKIP    = 0xFF;
        SFRPAGE = SFRPAGE_save;             // Restore the SFRPAGE
}


void XBar_Init ()
{
        unsigned char SFRPAGE_save = SFRPAGE;      // Save the current SFRPAGE
        SFRPAGE = CONFIG_PAGE;              // Switch to the necessary SFRPAGE
        XBR0      = 0x01;
        XBR1      = 0x40;
        SFRPAGE = SFRPAGE_save;             // Restore the SFRPAGE
}


void OSCILLATOR_Init (void){
   unsigned char SFRPAGE_save = SFRPAGE;    // Save the current SFRPAGE

   SFRPAGE = CONFIG_PAGE;              // Switch to the necessary SFRPAGE

   OSCICN |= 0x03;                     // Initialize internal oscillator to
                                       // highest frequency

   RSTSRC  = 0x04;                     // Enable missing clock detector

   SFRPAGE = SFRPAGE_save;             // Restore the SFRPAGE
}

and I'm using c8051F366. In the simulation I can see the values of registers are changing, but they are not graphically shown in the relevant peripheral simulation windows, next to register which is being changed. For example, if I go Port2 peripheral window, I can see the value P2MDOUT has changed to 0xFC but not ticks to indicate the bits which set and not set! I think this is a bug, or I'm doing some stupid thing which I cant figure it out.

Same thing happens for P1MDOUT, P1SKIP and P2SKIP with regards to the above code.

In my case, I can see the value P2MDOUT has changed to 0xFC but only 6th and 7th ticks are showing up (which equals to 0xC0 graphically). If I click the fifth check-box (which indicates the 5th bit of P2MDOUT) then the IDE automatically put ticks such a way that 0xFC is correctly showing up.

IDE-Version:
µVision V4.20.03.0
Copyright (C) 2011 ARM Ltd and ARM Germany GmbH. All rights reserved.

Tool Version Numbers:
Toolchain: PK51 Prof. Developers Kit Version: 9.01
Toolchain Path: C:\Keil\C51\BIN\
C Compiler: C51.Exe V9.01
Assembler: A51.Exe V8.02
Linker/Locator: BL51.Exe V6.22
Librarian: LIB51.Exe V4.24
Hex Converter: OH51.Exe V2.6
CPU DLL: S8051.DLL V3.72
Dialog DLL: DCYG.DLL V2.66
Target DLL: BIN\SiC8051F.dll V3.4.5.0
Dialog DLL: TCYG.DLL V2.66