Consolidated Cash Flow Doubts

Dear Sir, In calculating NCI movements for cash flow purposes, why do we take total comprehensive income into consideration, where as for retained earnings of the parent, we only consider the net profit? Secondly, in cash flow preparatory question of the bpp revision kit, parent acquired subsidiary for $5m, paid with $1m cash and $1,5m $1shares. In share capital they took $1.5m as share capital issued due to subsidiary and in share premium, they took (5-1-1.5) as the premium because of the acquisition of the subsidiary....could you kindly explain this?