First things first... have your daughter pull out the contract. What does it say? Every state is different, but here in PA there are a few things to look out for..
Inspections. Did your daughter elect for the home inspection contingency? If yes, did the Seller sign the Reply to Inspection addendum stating xxx amount of repairs would be done before closing? Is there a timeframe noted? In my contracts, I always request that repairs are completed at least one week prior to closing so we have time to check it before the final walk-through.
Settlement and Possession. Is the date the same for both of these? In PA it is stated that possession is to be delivered by deed, keys and physical possession of a vacant property at the date and time of settlement. If the Seller is leaving items at the property, they will become property of the Buyer.
Final Walk-Through. Your daughter and husband along with their agent should be conducting a final walk through of the home the day of closing, prior to heading to the table. If they are not satisfied with the home, DO NOT CLOSE.
It used to be that items could be credited at closing, for example if the inspection repairs were not completed, then the Seller could give the Buyer $$ as a credit. HOWEVER, mortgage laws and regulations have tightened and it is very challenging to make changes to the final HUD sheet at closing. All credits must be approved by the lender and chances are more than likely that a last minute credit will not get approved quickly and she will not be able to close anyway. This is why it is VERY important to get any issues regarding repairs or Sellers belongings resolved before you get to the table.
Agent. Do they have a Buyer Agency agreement? The agent is required by state laws to work in your daughter's best interest and to deal honestly and in good faith. If he is not doing these things, have your daughter contact his broker immediately. Her contract relationship is with the broker, with the agent as a designation. So if the agent is not doing his job, bring on the broker as that is her right.
Good luck to her!