L1A Blanket in Canada, Re-enter with existing L1A individual

[spidersixthsense]

Hi,

I am applying for L1A Blanket petition as my L1A individual is going to expire in June. Could you please help me with following questions?

1. Would they cancel my L1A individual irrespective of decision on my L1A blanket?
2. Do i need to travel with family or i can renew their L2 from US?

I am very confused right now as if things other way what happens to everything which i have in US or if i travel alone and family stays here.

Thanks