unknow tiles

Hello everybody, sorry for my bad english.

I use maptiler for generate map with jpg file. I select zoom 2, 3, 4. After generated, my folder zoom lvl 2 contains 3 folders 0,1,2.

My problem it's when i configure open layers, in /admin/structure/openlayers/layers/list/xxx/edit i select zoom 2, 3, 4 too.

And in /admin/structure/openlayers/maps/list/xxx/edit i authorize "Navigation" in behaviors.

When i preview map, at right i take unknow tiles (image) because zoom 2 use folder 0, 1, 2, 3, 4 but my map take only 3 folder 0, 1, 2.

It's possible i understand something else somewhere.

Can you help me ?