I can't see how it could have had any negative effect on you as a buyer or even if you had been the seller for that matter. Almost all real estate attorneys I know have title company affiliations. However, there should have been a disclosure in the package you signed when you closed. If I recall correctly, it would have been called something like the Controlled Business Arrangement or something like that. If you have any concerns, you should probably speak to the attorney that represented you at closing. I'm pretty sure they would have known of the seller's attorney title company affiliation.