Sorry for the slight gap in posting – the Chagim were slightly disruptive to say the least and I have been traveling due to work commitments but the daf waits for no man or woman for that matter! I have managed to keep up and though that it would be appropriate to share 2 key concepts from pages 11 & 12 (post on daf 12 to follow later).
Daf 11 – The Rabbis do not decree to protect another decree
ואנן ניקום ונגזור גזירה לגזירה
And will we arise and issue [one] decree [to prevent violation of another [decree?]
The principle that a decree is not issued upon a decree is accepted in the Gemara and has support from the Torah. Although there is a directive to establish protection for mitzvoth, protection for that protection is not established. Of course, if that were to be done, it would continue ad infinitum. Although Abaye agrees with the principle, he holds that since carrying out on the Shabbat is an insubstantial labor that hardly seems like a bona fide prohibited labor, it was necessary to establish extra protection for it. (Ritva)