Catch Up - Purchase Agreeement

I'm a little behind in starting this process.  So far we have signed our purchase agreement, secured our pre-approval and made design decisions.  Our house is scheduled for completion in November.

Little background...my husband and I have been married for a little over 2 years and we have 2 wonderful little children, a boy and a girl.  He is a 2nd lieutenant in the United States Army and I work in contracts.  We currently live in AL but our house is being built in Maryland where we will be moving once he gets out the Army in the fall.

So far the process has been very stressful.  Our sales rep has not been the best.  We felt very rushed through the purchase process. She didnt go over the available options with us and at one point told us she didnt want to waste her time if we weren't going to go through with it (even though we had given her no reason to think we wouldn't). Despite what's been disappointing customer service, my husband and I are moving forward because we believe this will be a good investment for our family.

Some interesting misshaps thus far:  
*My husband and I live in AL. The house will be in MD.  We came up for a 4 day weekend just to purchase this house.  No one was available to sell us the house until the 3rd day.
*Sales Rep got 3/4 of the way through the 100 page purchase agreement before realizing she was selling us the wrong house. There is a larger version of the Mozart with a morning room etc.  She assumed this was the house we wanted, never asked and the paperwork didnt specify until the end when she started showing us specs and they werent right.  When I pointed out that it was the wrong house she got an attitiude with me like it was my fault.