Check and uncheck boxes script not working

I'm running into a problem where I have 4 sets of check boxes. 

set 1 is called Severity and there's options 1-4

set 2 is called Probability and there's options 1-4

set 3 is called Criticality and there's 16 options and is automatically checked based on selections from set 1 and set 2. (i.e. if you select 4 from Severity and 3 from Probability then it automatically checks 12 in Criticality)

set 4 is called AEM and has 3 options.

option 1 is automatically checked if 16, 12, or 9 is checked in set 3

option 2 is automatically checked if 8 or 6 is checked in set 3

option 3 is automatically checked if 4 or below is checked in set 3

The problem I'm running into is that if I manually check the boxes in set 3 then set 4's auto checking works. However if I make selection from sets 1 and 2 and it autochecks a box in set 3, then set 4 doesn't auto check.

Here's an example of what I have for the autocheck for set 3:

console.println(this.getField("Severity4").value);
console.println(this.getField("Probability4").value);
console.println(this.getField("Criticality16").value);
if (this.getField("Severity4").value != "Off" && this.getField("Probability4").value != "Off") {
this.getField("Criticality16").value = "Yes";
}
else {
this.getField("Criticality16").value = "Off";
}

and here's an example of what I have for the autocheck for set 4:

console.println(this.getField("Criticality16").value);
console.println(this.getField("Criticality12.1").value);
console.println(this.getField("Criticality12.2").value);
console.println(this.getField("Criticality9").value);
console.println(this.getField("Non-AEM").value);
if (this.getField("Criticality16").value != "Off" || this.getField("Criticality12.1").value != "Off" || this.getField("Criticality12.2").value != "Off" || this.getField("Criticality9").value != "Off") {
this.getField("Non-AEM").value = "Yes";
}
else {
this.getField("Non-AEM").value = "Off";
}