When did the first grantor die?  This was probably a cookie-cutter trust document that used boiler-plate terminology appropriate to the days when the estate tax exemption was under $1 million, but not since it was increased.  Try to wade through the trust document and figure out if the whole thing became irrevocable at the first death, or just half of it.  If the trust document says the assets should be divided into two separate trusts, try to find out if that was ever done. (Hint:  Usually not.)  Why does the trust have an EIN?  Not needed unless it is irrevocable, or a new trustee is appointed.  

Has the trust been filing 1041's before this year?  What has been reported on them?  Have the property taxes been deducted anywhere?  I feel sorry for people who think a living trust solved all of their estate-planning problems, until I remind myself that they did it to themselves.