It is true that the information you are looking for: How many showings have been made? and Were there any offers made? will not be given to you by the listing agent or the Broker's office because the listing agent and Broker have entered into a confidential business agreement with the seller. That being said, as a consumer not a Realtor, I might be interested in that information if I were trying to sell my home in the same neighborhood. But you are a buyer. That information is not the best or only way to help you make an informed decision on how to formulate your offer. The recent sales, the condition of the property, and how strong your finances are will dictate how to best present your offer to purchase.
In your situation where you believe the your Realtor and the Listing Agent are not on good terms, you might want to suggest to your Realtor, that he or she might want involve the Broker of the office. The Broker of the office can act as a buffer. We personally have asked our Broker to intervene on our clients behalf in order to provide the best representation for them.
Though some of that info you are looking for may not be answered, you will have more certainty that the emotional content of your situation will be diffused and you may even get the seller's agent to get the seller to agree to communicating some of that information if your intentions were explained.
So, in short, get the Broker involved and explain why you believe your questions are important to know prior to makeing an offer to purchase. There is more than one way to cook a caserole.