Delete specific pages when checkbox unchecked in PDF

I have two check boxes that I want to spawn templates when checked, and delete those pages when unchecked. I have no issue spawning the templates, but I am unable to determine the page number once they are spawned to be able to delete these once unchecked.

• Checkbox1 spawns/should delete template1
• Checkbox2 spawns/should delete template2 & template3

I understand the pages start at 0, but the output does not make sense when I print to console. The three templates are hidden.

I check checkbox1 then checkbox2, and uncheck in the same order and the console prints the following for the page numbers:

temp1pages=0
temp2pages=-1,-11
temp3pages=0

My code currently is this for checkbox1:

if(this.getField("Checkbox1").isBoxChecked(0) == true){
    var temp1 = this.getTemplate("template1");
    temp1.spawn();
}
else{
    var temp1pages = this.getField("template1_field").page+1;
    this.deletePages(temp1pages);
}

and for checkbox2:

if(this.getField("Checkbox2").isBoxChecked(0) == true){
    var temp2 = this.getTemplate("template2");
    var temp3 = this.getTemplate("template3");
    temp2.spawn();
    temp3.spawn();
}
else{ 
    var temp2pages = this.getField("template2_field").page+1; 
    this.deletePages(temp2pages);
    var temp3pages = this.getField("template3_field").page+1;
    this.deletePages(temp3pages);
}