ID script to increase numbers?

This script will help you

https://github.com/stevenwareham/numberAdjuster

@Steve Straus I have send you a personal script for that in your private message... 

Copy the index to a new document then try this?

var d = app.activeDocument;
var f = "\\d+(-\\d+)?$";
app.findGrepPreferences.findWhat = f;
var fs = d.findGrep();
var t, i, j, s;
for (var i = 0; i < fs.length; i++) {
    t = fs[i].contents.split("-");
    s = "";
    for (j = 0; j < t.length; j++) {
        if (j == 0) {
            s += (Number(t[j]) + 2).toString();
        } else {
            s += "-" + (Number(t[j]) + 2).toString();
        }
    }
    fs[i].contents = s;
}