Won't fix
Reported for: Toolset Blocks 1.0
When using Toolset Blocks on a site that already uses Toolset Layouts, existing template layouts will be the ones used to render the content on the front-end.
This means Layouts will override any Content Templates you create using Toolset Blocks and the Block Editor.
The only way around this is to stop using Layouts on the content you want to design with the Block Editor.
However, if you have content that is not yet using template layouts, simply go to the Toolset → Content Template page, create a regular Content Template for that content and start designing it using blocks. You can still use Layouts for other parts of your site if needed.