change the colors used "Blueprint", but there is a problem how to put together to press only one.

Hello! I am made the creation of change colors using “Blueprint” then tested playing and clicking the mouse to change the colors now works well, but the problem is when I clicked the mouse selection one, and two together how to remove?
i have uploaded files here: - this is a project engine - this is a short video examples so that you understand how you can solve the problem

Hello! Couldn’t open a project? which engine version do you use? I use the 4.25 engine, today I again uploaded a short video via YouTube, and threw off 10 images for you to watch here if you know and can solve the problem. I will teach the engine a beginner)…