On selecting "Fixed Delta And Exact Time" option in Update mode, Exact Fixed Time Step get selected.

Steps to repro:
1. Create a new HDRP template project.
2. Project Window > Click on "+" > Visual Effects > Visual Effect Graph.
3. Select New VFX graph > Inspector > Update Mode > Fixed Delta And Exact Time.

Actual Result:
Exact Fixed Time Step get selected instead of "Fixed Delta And Exact Time"

Expected Result:
"Fixed Delta And Exact Time" option should get selected.

Reproducible in:
2020.2.0a16, 2020.1.0b14, 2020.1.0a23 with Package Version: 9.0.0, 8.1.0, 8.0.1.

Environment:
Occurring on Windows 10 & Mac 10.15.