As with any legal document, if you have any questions at all regarding the wording, intention and obligations, than you should seek an expert that is licensed to understand the law and real estate agreements. A professional Realtor or an attorney should be able to read all of your documents and render an opinion upon your obligations and the other party obligations to those documents.
It does sound like the broker in whom you have or had your agreement with is willing to discuss any questions that you have and also willing to state their position on the agreement. This should be a free service; therefore, I would personally utilize this option first. A simple short meeting, in person, with the responsible party that you have or had your agreement with should give you very clear options as to the direction you need to take. During this meeting I would take a person along to take notes and be a listener only, while you concentrate upon the discussion taking place. Perhaps this short meeting will, at the least, give you a clear understanding as to the position taken by the other party. This allows you to determine if this position is helpful to you endeavors or if you need to begin negotiations to aid you in accomplishing your goals.
If the other party does interpret your obligations to the agreement to be continuing and still in force, than ask for the clause in which they are basing their position upon. If you feel that your needs are not being represented as to the agreement in question, than state your position and give basis as to why you understand the terms differently. If after the meeting is finished, neither party are in complete agreement than perhaps further clarification by an attorney would give you additional clarifications as to your position.
An attorney will be at your cost and I would verify that their experience level does include real estate contract agreements. An attorney could further advise you at this point towards the appropriate direction or options that you have.
As to the terms of marketing, the more sites that are directing any buyer towards your home either through a Realtor or directly are a GREAT thing.
Bottom line is you have some apparent concerns as to the representation of your needs with the marketing of your home. From this forum it does appear that your professional Realtor is willing to communicate with you to assist you with your needs. So go talk to them directly. Itâ€™s free and it would take less than an hour versus the months that have already passed.
As a former seller of real estate, the time period of marketing, negotiations and processing the closing is VERY stressful, even though I have been around the process for years. Emotions tend to make most people act in ways that an outsider may not. In other words do your best to remain calm and stay open to guidance from the professionals that you placed your trust into. As most of the post stated in this chain, most Realtors are there to help you accomplish your goal, not to make your life and theirs stressful.