SDL2 double buffer not working, still tearing - c++

Question

I need a double buffer because i'm starting to notice tearing when I want to move my texture made tile map around the screen via mouse click.
I'm using SDL2 and this is a SDL2 specific question, check out my code that produces tearing, whats wrong?
//set up buffer and display
bufferTexture = SDL_CreateTexture(renderer,SDL_PIXELFORMAT_RGBA8888,SDL_TEXTUREACCESS_STREAMING,800,600);
displayTexture = SDL_CreateTexture(renderer,SDL_PIXELFORMAT_RGBA8888,SDL_TEXTUREACCESS_TARGET,800,600);
while(running)
{
handleEvents();
SDL_SetRenderTarget(renderer,bufferTexture); // everything goes into this buffer
SDL_RenderClear(renderer); // clear buffer before draw
gTileMovement.updateMapCoordinates();
for(int i = 0; i < MAP_ROWS; i++)//rows
{
for(int j = 0; j < MAP_COLUMNS; j++)//columns
{
x = (j * 100) - (i * 100);
y = ((i * 100) + (j * 100)) / 2;
drawTiles(i,j,x,y);
}
}
//move from buffer to display texture
memcpy(&displayTexture,&bufferTexture,sizeof((&bufferTexture)+1));
//change render target back to display texture
SDL_SetRenderTarget(renderer,displayTexture);
//show it all on screen
SDL_RenderPresent(renderer);
}
for all it matters here is my drawTiles function too, is this not conventional? :
void drawTiles(int i,int j,int x,int y)
{
//updates based on a mouse clicks xy coords
gTileMovement.updateMapCoordinates();
if(tileMap[i][j] == 1) // grass?
{
gSpriteSheetTexture.render(x+gTileMovement.getUpdatedX(),y+gTileMovement.getUpdatedY(),&gSpriteClips[1]);
}
if(tileMap[i][j] == 0) // wall?
{
gSpriteSheetTexture.render(x+gTileMovement.getUpdatedX(),y+gTileMovement.getUpdatedY(),&gSpriteClips[0]);
}
if(tileMap[i][j] == 2) // tree?
{
gSpriteSheetTexture.render(x+gTileMovement.getUpdatedX(),y+gTileMovement.getUpdatedY(),&gSpriteClips[2]);
}
}
Which followes into how I SDL_RenderCopy the tiles through a class. This copies the textures onto the current targeted renderer does it not? Which is the buffer texture if i'm not mistaken.
void LTexture::render(int x, int y, SDL_Rect * clip)
{
SDL_Rect renderQuad = {x, y, mWidth, mHeight};
if(clip != NULL)
{
renderQuad.w = clip->w;
renderQuad.h = clip->h;
}
SDL_RenderCopy(renderer, mTexture, clip, &renderQuad);
}