[Mark McLeod]

You can give the Relay conflicting demands.
You tell it to go Forward and Reverse at the same time.
Maybe do something like the attached to avoid that issue.

You also created your input values incorrectly.
That's what the red dot means.
Delete one and replace it by positioning the cursor over the input node, right-click and choose Create -> Constant.
You'll get the same (looking) thing without the red dot. The problem that red dot introduces is that the enumerated word may not always mean what you think it should mean.

What colors do the Relay LEDs turn for Forward/Reverse/Off?