The 2 dots indicate that the editor considered the addition of the waw a mistake. In line 7 there may be a waw written between the 2 lameds of the last word. In line 13 a mark whose meaning is obscure is between the first two words. In line 17 the first letter has been over written and an attempt to correct a mistake is written over the word. Adonai is the Masoretic reading.
Aleph is correct.
See Introductory page under section VI . Some translators all give bows for the singular form in M and some give bow and arrows.