TYPO3 Core

the bug is still present in TYPO3 6.2.x:

my test, TYPO3 6.2.12, fresh install

[root]
--[ID=1] Home page
----[ID=2] My page
------[ID=3] My subpage
---- [ID=4] My page 2

1. on [ID=1] Home page, I create a BE layout, I call it "be layout home page" > it is visible in the dropdown "appereance > page layout" of home page
2. on [ID=2] My page, I create a BE layout, I call it "be layout my page"
editing the page, the dropdown "appereance > page layout" contains both layouts, "be layout home page" and "be layout my page"
3. on [ID=3] My page, I create a BE layout, I call it "be layout my sub page"
editing the page, the dropdown "appereance > page layout" contains all layouts, "be layout home page" , "be layout my page", "be layout my sub page"

4. even moving the layouts in some subfolder, this way:

[root]
--[ID=1] Home page
----[ID=2] My page
------[ID=3] My subpage
---- [ID=4] My page 2
---- [ID=5] Sysfolder Layouts 1 contains "be layout home page", "be layout my page"
---- [ID=6] Sysfolder Layouts 2 contains "be layout my sub page"

the situation remains the same: the dropdowns in all the pages contain always all the be layouts records

I am closing this issue as the DefaultDataProvider is the most simple solution.

As a solution I would suggest to use TsConfig

mod {
    web_layout {
        BackendLayouts {
            exampleKey {
                title = Example
                config {
                    backend_layout {
                        colCount = 1
                        rowCount = 2
                        rows {
                            1 {
                                columns {
                                    1 {
                                        name = LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:colPos.I.3
                                        colPos = 3
                                        colspan = 1
                                    }
                                }
                            }
                            2 {
                                columns {
                                    1 {
                                        name = Main
                                        colPos = 0
                                        colspan = 1
                                    }
                                }
                            }
                        }
                    }
                }
                icon = EXT:example_extension/Resources/Public/Images/BackendLayouts/default.gif
            }
        }
    }
}