Is there any possibility that your agent forwarded this to you rather than it came directly from the agent working w/ the buyer?
I don't see any problem with the dialogue itself.
From what I understand of the situation, the buyers agent is letting your listing agent know that the roof is bad and that her buyers need $7000 towards future repairs at closing. That is 100% expected.
When I represent a buyer and something needs to be fixed, I advise my buyer. Your listing agent is working for you, the seller, and the buyer's agent is working for the buyer. If the life on the roof is looking very grim, I would call the listing agent and/or email her to tell her what my buyers said. This is communication between both the buyers and sellers through the agents. Unless there is more to this story, I doubt this is a conflict of interest.
Your agency agreement probably discloses that this particular office has multiple agents, meaning not all the agents within this office work for you NOR are they privy or allowed to access your file.
For example, there may be 500 "ABC Real Estate Agency" agents, but the only one that works for you is the one you signed agency with. And if another "ABC" agent brings a buyer they only work for the buyer.
In most cases, real estate agents are independently contracted and although we work for the same office we don't share files or clients. We solely work for our client and our client's interest.
Lastly, call your agent and ask why you received this email if you are worried or confused. Open and honest communication is always the best.
You are listed as "just looking." From you question, I assume you have your home listed for sale... This is not a conflict of interest. It is a negotiation. Your agent represents your interests, the other agent represents the buyers interests. It really is that simple. Perhaps when you signed your listing agreement, you failed to understand the legal implications of differing types of "agency relationships"? The legal terms of such can be difficult to understand (it's even sometimes tough for new licensees). The only possible issue I can infer from your question is that there MAY be a conflict of interest IF the incorrect "agency relationship" was established between you and your listing broker. Since "agency relationship" is defined differently from state to state; I will stop here and wait for a Texas REALTOR to chime in...
Not having all the facts or knowing all the details, you may want to contact the actual Broker in name for that company. If you get no where you might want to contact the local Board of Realtors(r) for their advice.
Unless a realtor works for himself, or work for a very small brokerage, the majority of the time his office or brokerage will have many Realtors. For me, a local firm, my brokerage has about 500 agents. As we are also one of the most successful companies locally, agents in the same brokerage often ended up have clients who want to buy listings under our own brokerage.
As long as there are two agents, one represent each side, it's generally O.K. Although in CA, the first thing we do is to ask our clients sign disclosure about possible dual agency or the same brokerage representing more than one buyer or sellers. If your agent has explained the possibly to you beforehand, this might not be as big a concern to you.
I agree with Bridgett, what the buyers agent is doing is probably telling your agent what his client thinks about the inspection issue (roof) and how to remedy that - it's a negotiation process from both sides.
Unfortunately, you, instead, of your agent received the email, and your agent did not have the chance yet to explain to you what is going on.
Again, both are normal situation, but the lack of disclosure upfront and misfortune of mixed up email certainly make the situation seem worse for you.
Hope this helped.