Ignore that snotty response from madcowdisease, he is part of the arrogant posters you find on here.
To commence a multi engine CPL you require 70 hours P1 and 150 hours total time, however for licence issue you require 100 hours P1 and 200 hours total time.
You are correct in your second statement, but beware because if you were to partial the CPL your hours would be PUT not P1S therefore on partial retake you would only get, for example 30 mins of P1S time.
If you do wish to read LASORS (section D) the link is here
http://www.caa.co.uk/docs/175/srg_lt...ection%20D.pdf