sample code to use tiled resource technology in d3d11.2? - directx

Question

i got a strange result in calling UpdateTileMapping and UpdateTiles every frame like this which as same as the Mars Tiled Resource Sample do:
void CalledEveryFrame()
{
vector<D3D11_TILED_RESOURCE_COORDINATE> coordinates; // 4 diffrent coordinates
vector<D3D11_TIL_REGION_SIZE> regions; // 4 as same. but only set the NumTiles=1
vector<UINT> offsets(4, 0);
vector<UINT> rangeFlags(4, 0);
vector<UINT> rangeTileCounts(4, 1);
deviceContext->UpdateTileMappings(myMiscTexture, 4, coordinates.data(),
regions.data(), myMiscBuffer, 4, rangFlags.data(), offsets.data().
rangeTileCounts.data(), D3D11_TILE_MAPPING_NO_OVERWRITE);
map<int, vector<float>> myTileData; // 4 with different data.
for (int index = 0; index < coordinates.size(); index++)
{
D3D11_TILED_RESOURCE_COORDINATE coord = coordinate[index];
D3D11_TILE_REGION_SIZE region = regions[index];
deviceContext->UpdateTiles(myMiscTexture, &coord, &region, myTileData[index].data(), D3D11_TILE_COPY_NO_OVERWRITE);
}
}
i alway got 4 same TileData show in different coordinate.
if i copy the code above with another 4 coordinate like this:
void CalledEveryFrame()
{
UpdateTileMappings(coordinates);
for(coordinates)
{
UpdateTiles(TileData);
}
UpdateTileMappings(coordinates2);
for(coordinates2)
{
UpdateTiles(TileData2);
}
}
i alway got 8 same TileData showing, why?