Hi.
The clamp does work properly.
And the player moves at the same speed to every direction.
The Clamp magnitude is not calculated x + z it has a different calculation than the 'Store Magnitude' on the Get Axis Vector'
In the playmaker editor you can check 'Debug' (Below the states, on the left from the 'Action browser button')
Then you can see the values on the actions (also when playing)
Play around with some lower values so you can see what it does