is there a way to disable the 'Cascade schema changes' options when i create a standard page using asset builders?
No -- assets will always inherit the metadata, permissions, design and paint layouts applied to their parent.
too bad... my problem is everytime i create an asset using builders, and then place the created asset by a certain standard page asset, the created asset's metadata schema inherits the metadata schema of the parent standard pages automatically, what happend is the current metadata fields that the created holds conflicts with the inherited metadata fields.