I just checked, once, and learned that the system will allow you to call back and vote again. I am certain that the other side will take full advantage of this.
I know some systems have (or used to) only batch capabilities, and would only be able to screen duplicates such as overnight (not real-time).
Let us hope this is the case here.
You can bet the MSM has already writen the story about the poll, 78% of Nevada Residents want to give up their nasty evil killing guns!