delay down problem on ion v1.8

I want to give cue 8 a delay down time of 3.30 min. It did not work. I tried cue 1 till 9. They all have the same problem except for cue 1.5 and above 10.

I just installed softwareupdate v1.8 on the ion, but had the same problem with v1.7

What did I do wrong?

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