Sprite Problem

[HelloPeople1]

Hi guys
I'm writing a top down shooter game in pygame and wanted to use sprites for my object. I got a character sprite working fairly well except I have two problems.
1. When I rotate my character the point of rotation is changing. This causes a uneven rotation in my character

2. I have a problem with rotating at the same time as moving. I can rotate after I have moved in a single direction for several seconds, but as soon as change directions, I can no longer rotate until I have waited another several seconds.

Here is my code:

import sys,os,math,random,pygame
from pygame.locals import *
#from engine import *

def distBetween(pointA = (0,0), pointB = (0,0), mode = 'd'):
	a = pointB[0] - pointA[0] # X Displacement
	b = pointB[1] - pointA[1] # Y Displacement
	if mode == 'd': # Distance
		return math.sqrt(a**2 + b**2)
	elif mode == 'v': # Vector
		return (a,b)

def angleBetween(pointA = (0,0), pointB = (0,0), mode = 'd'):
	vector = distBetween(pointA, pointB, 'v')
	radians = math.atan2(vector[1], vector[0])
	if mode == 'd': # Degrees
		return math.degrees(radians) 
	elif mode == 'r': # Radians
		return radians

class Character(pygame.sprite.Sprite):
    def __init__(self,xy):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load("box.jpg")
        self.rect = self.image.get_rect()
        self.rect.centerx, self.rect.centery = xy
        self.velx = 0 
        self.vely = 0
        self.angle = 0

    def move_up(self,speed):
        self.vely -= speed
    def move_down(self,speed):
        self.vely += speed
    def move_right(self,speed):
        self.velx += speed
    def move_left(self,speed):
        self.velx -= speed

    def Rotate(self):
        angle = angleBetween((self.rect),pygame.mouse.get_pos(),'d')
        rotated = pygame.transform.rotate(self.image,angle * -1)
        return rotated

    def move(self,dx,dy):
        if self.rect.bottom + dy > 768:
            self.rect.bottom = 768
        elif self.rect.top + dy < 0:
            self.rect.top = 0
        elif self.rect.right + dx > 1024:
            self.rect.right = 1024
        elif self.rect.left + dx < 0:
            self.rect.left = 0
        else:
            self.rect.y += dy
            self.rect.x += dx

    def update(self):
        self.move(self.velx,self.vely)



pygame.init()
screen = pygame.display.set_mode((1024,768))
clock = pygame.time.Clock()
pygame.display.set_caption("In Utterblossomness")
pygame.display.flip()
Player = Character((200,200))
angle = 0
rotated = Player.image


while 1:
    clock.tick(30)
    screen.fill((0,0,0))
    mouse_x,mouse_y = pygame.mouse.get_pos()
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            exit()
        elif event.type == KEYDOWN:
            if event.key == K_ESCAPE:
                    pygame.quit()
                    exit()
            if event.key == K_w:
                Player.move_up(5)
            if event.key == K_s:
                Player.move_down(5)
            if event.key == K_d:
                Player.move_right(5)
            if event.key == K_a:
                Player.move_left(5)             
        elif event.type == KEYUP:
            if event.key == K_w:
                Player.move_down(5)
            if event.key == K_s:
                Player.move_up(5)
            if event.key == K_d:
                Player.move_left(5)
            if event.key == K_a:
                Player.move_right(5)
        
    rotated = Player.Rotate()
    x_pos = Player.rect.x - (Player.image.get_width()/2)
    y_pos = Player.rect.y - (Player.image.get_height()/2)

    Player.update()           
    screen.blit(rotated, (x_pos,y_pos))
    pygame.display.update()

Thanks for your help