not too sure what to do

Question
WE used to always have one dog. She is 2 years old and neutered. She is a mix, i am not to sure what type but she is very playful(people + dogs) and loves attention. This dog is very obedient and never needs a leash. This dog is stubborn but not dominant, if another dog comes by she will just lay on her back.

After we moved to a bigger property (2 acres), we decided to get another dog. This is a small German Shepard(not that obedient yet),and is a little taller then the mix but the german shepard is very skinny and bony. She is 4 years old and also playful, sweet, and loves attention, but is more dominant. Also neutered.

We did not think this would be a problem since the mix is the oppsite of dominent.

As it turnes out, the mix is not going down without a fight, probebly because she was there first.

Since the german shepard has been underfed she is not as stong as she will be in a few months. Right now the dogs are about the same strength, and they are "play-fighting" for about 2 hours each day, especially if there are people around. It has been about two weeks and they still have not established pack order.

We are a family of four and pretty social, other people come by often.

a few nights ago we had some people over. and there was meat involved and all these new people. The dogs all of a sudden just went crazy and started fighting. none of the dogs really got hurt, nobody was bleeding except for me. it looked worse then it ended up being. i assume it was just too much, new people, meat, who is boss. also, the next day they were just fine like always. they are still very curious about each other; what is she sniffing at? where is she going; what is she seeing? etc. and they are still "play-fighting.

but what am i supposed to do in all of this, what is my role?
how long does this normally take?
should i just let them figure it out?  

Answer
Better leadership on your part may help.  The key to most behavior problems is approaching things using the dog's natural instincts. Dogs see all the people and dogs in the household as a pack with each having their own rank in the pack and a top dog. Life is much easier if the 2 legged pack members outrank the 4 legged ones. You can learn to play the role of top dog by reading some books or going to a good obedience class. A good obedience class or book is about you being top dog, not about rewarding standard commands with a treat. Start at http://www.dogsbestfriend.com/ For more on being top dog, see http://www.dogbreedinfo.com./topdogrules.htm  If any of the 4 of you are younger, follow their links to dog and children.  

There are cases where even the most experienced dog owners can't keep peace between 2 dogs, most common with 2 females.  Some time and them accepting they are fighting for fifth place after all the family may solve the problem.  

I wouldn't worry about the play fighting.  It is normal.