Function is being executed more than once - ios

Question

I have been knocking my head over this problem for a few days now. I have a function that
1) gets the snapshot values and then stores them into filteredLocations array
2) gets the location the user has pressed on the screen, then measures the distance between the two location points of where they pressed on the screen and the location from the snapshots
3) filters out the locations that meet the users radiusDistance and then places points on the map
The problem that I keep coming across though is with my print statements check 1 and check 2. They are being executed twice when it should only be once.
func addAnnotation(gestureRecognizer:UIGestureRecognizer){
filteredLocations.removeAll()
locations.removeAll()
let sampleRef = FIRDatabase.database().reference().child("SamplePost").child("post")
sampleRef.observeSingleEvent(of:.value, with: {(snapshot) in
if let result = snapshot.children.allObjects as? [FIRDataSnapshot] {
for child in result{
let dictionary = child.value as? [String: AnyObject]
let lat = dictionary?["lat"] as! Double
let long = dictionary?["long"] as! Double
let image = dictionary?["image"] as! String
let text = dictionary?["text"] as! String
let user = dictionary?["user"] as! String
let structure = MapPoints(Latitude: lat, Longitude: long, Image: image, Text: text, User: user)
self.filteredLocations.append(structure)
self.locations.append(structure)
print("check one \(self.filteredLocations.count)")
self.collectionView.reloadData()
}
}
let refined = Double(self.radiusDistanceNumber!)
print("check two \(self.filteredLocations.count)")
if gestureRecognizer.state == UIGestureRecognizerState.began{
self.removePointsAndClearArray()
let touchPoint = gestureRecognizer.location(in: self.mapView)
let newCoordinates = self.mapView.projection.coordinate(for: touchPoint)
let marker = GMSMarker(position: newCoordinates)
marker.title = "Selected location"
self.filteredLocations = self.locations.filter {
(locations) in
let userLocation = newCoordinates
let userLat = userLocation.latitude
let userLong = userLocation.longitude
let coordinateOne = CLLocation(latitude: userLat, longitude: userLong)
let coordinateTwo = CLLocation(latitude: CLLocationDegrees(locations.latitude!), longitude: CLLocationDegrees(locations.longitude!))
let distanceFromPoints = coordinateOne.distance(from: coordinateTwo)
let convertToMiles = distanceFromPoints*0.00062137
return convertToMiles < refined
}
print("check three \(self.filteredLocations.count)")
self.filteredLocations.map {
(location) in
let annotation = GMSMarker()
annotation.position = CLLocationCoordinate2D(latitude: CLLocationDegrees(location.latitude!), longitude: CLLocationDegrees(location.longitude!))
annotation.map = self.mapView
let camera = GMSCameraPosition.camera(withTarget: newCoordinates, zoom: 11)
self.mapView.animate(to: camera)
}
print("amount that is being counted \(self.filteredLocations.count)")
if self.filteredLocations.count <= 0 {
self.collectionView.isUserInteractionEnabled = false
} else{
self.collectionView.isUserInteractionEnabled = true
}
print("amount before reloading collectionView \(self.filteredLocations.count)")
self.collectionView.reloadData()
UIView.animate(withDuration: 0.3, delay: 0, options: .curveEaseIn, animations: {
})
}
})
}