I can't extend an object without being repeated

Hello there!
I’m new in this and I started creating a platformer game.
When I’m going to insert an object in the scene, and selecting the mosaic option (that and the text and the sprite options)
and after selecting and putting the object as a platform when I want to extend it, it starts repeating itself…
Sorry for my English but the question is: How can I extend an object without being repeated?


You should use a Sprite and not a Tiled Sprite (which is repeated when extended).