"Ghost rectangle" affecting program? - iphone

Question

Yesterday there was a rectangle stuck in the top corner of my program, and for some reason no matter what I did I could not get it out of there. Today I re-ran the program, and it disappeared, but I believe it's memory is still stuck because it's affecting my code.
I'm trying to detect when rectangle A (motioned by accelerometer) contacts rectangle B (randomly placed; motionless). Nothing happens when A contacts B, however when I move A into the top corner where the ghost rectangle was all of yesterday it runs my if statement continuously until I move it away.
Here is the code just incase it's needed
#synthesize Button;
#synthesize Rand;
//Awaking the accelerometer
-(void) awakeaccelerometer
{
[[UIAccelerometer sharedAccelerometer]setUpdateInterval:1.0/50.0];//<---Sensitivity
[[UIAccelerometer sharedAccelerometer]setDelegate:self];
NSLog(#"Accelerometer is awake");
float randX = arc4random() % 320;
float randY = arc4random() % 548;
CGPoint randNewPlace = CGPointMake(randX, randY);
Rand.center = randNewPlace;
}
//Controlling the accelerometer
-(void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
#define MovingObjectRadius 4
//Acceleration for player
valueX = acceleration.x * 10; //speeds
valueY = acceleration.y * -10; //speeds
//Create new integers
int newX = (int)(Button.center.x + valueX);
int newY = (int)(Button.center.y + valueY);
//Position Validate...This stops the movements from going past the screen; 320 pixels
//For X
if (newX > (320 - MovingObjectRadius))
{
newX = (320 - MovingObjectRadius);
}
if (newX < (0 + MovingObjectRadius))
{
newX = (0 + MovingObjectRadius);
}
//For Y
if (newY > (548 - MovingObjectRadius))
{
newY = (548 - MovingObjectRadius);
}
if (newY < (0 + MovingObjectRadius))
{
newY = (0 + MovingObjectRadius);
}
//Make the new point
CGPoint buttonNewCenter = CGPointMake(newX,newY);
Button.center = buttonNewCenter;
CGRect blockRect = CGRectMake(newX, newY, 20, 20);
CGRect targetRect = CGRectMake(randX, randY, 20, 20);
if (CGRectIntersectsRect(blockRect, targetRect))
{
float tnewX = arc4random() % 320;
float tnewY = arc4random() % 548;
CGPoint randNewPl = CGPointMake(tnewX, tnewY);
Rand.center = randNewPl;
}
}