This is correct. The first firm administrates the dissolution of the trust and distribution of its assets to the heirs and the second firm, apparently a sole practitioner, represents my brother as trustee.
This was my first thought and still what I think the most likely reason, but I can't...
Brief question first, details after:
Is it normal for a beneficiary of an estate to be directed to contact the executor only through the latter's legal representation? In this case, the trustee is my sole co-beneficiary (and brother)
Detailed version:
Our parents had a revocable family trust...