Start Check box at "Check Box1" again

I know, I know.. this is the JavaScript forum... but, I cannot find out how to start the check box naming at "1" again... I have many check boxes to add to my form, but the automatic field name stars at "Check Box20" (this session) and auto counts up from there. If I rename it to "Check Box1" and then add a new check box, it names the next one "Check Box21" and so on, instead of naming it "Check Box2."

I couldn't find anything about this in the Acrobat X pro guide or after several Google searches. This has to be simple to do!!