Fill bucket, fill in colour bug

I try to fill the colour on the fill bucket, but the image of fill is not align with the actual size and alignment.

That’s because the fill bucket tool is used for vector drawings. To align the drawing with the color you should try grouping it.

Thanks Barfy, i already grouping it for fill bucket.

I fix the issue by resize the fill image and realign it back.

What does that mean?