Why do some brushes copy the settings from the previous selected brush?

[default0nc77cul7z0t]

Issue: Why do some brushes copy the settings from the previous selected brush?

example: If brush 1 and brush 2 have  different settings; brush mode, opacity, and flow. 

               When I select brush 1 then select brush 3, brush 3 will adapt the setting from brush 1. 

               Consistenly, when I select brush 2 then, select brush 3, brush 3 will update and copy the setting                       from brush 2. 

What is this behavior and how can you turn it off? 

[Trevor.Dennis]

Photoshop has been able to record additional preset information for several version updates.  If you click on the little cog icon and turn on the options I have outlined, you can see what tool presets are asociated with.  It is still possible to select a preset  without it changing tools by holding down the Ctrl (Cmd) key when clicking on them.