Donations in Memory of Loved Ones

I've started getting letters from the Mt. Diablo Peace and Justice Center, where Mom did volunteer work and some people made donations in her memory.  They were copies of the thanks Mt. Diablo was giving to our friends, and the form letter included Mom's name in that slot of "in memory of..." Thank you, Jeanne, Eileen, and Doris and Ralph Copperman.
  I also made a donation to the Y, where I go every other day at 5:00 am.  Mom taught me, by example, to give to organizations that weren't popularly supported--ones that needed help more, and I never thought of the Y in that way.  But it was a way of supporting a place I like, a place that's important in my life, and even though I'd fairly recently made a donation, I decided to give a donation of $90.00 with Mom's obituary and a note explaining that she would have been 90 if she had lived two more weeks.  This was also my way of letting people know that Mom had died.  I like the people at the Y; I feel a general sense of good will and friendliness.  But I don't know them well.  When I got a letter acknowledging my donation, which I got promptly, it was a form letter, and it made no mention of my mother at all.  It was signed and personalized with a "Thank you very much!"  So should I complain that there was no mention at all of my mother?  I understand that the obituary went up for a day or so, but I never saw it, and the only one who mentioned it was the nice receptionist, who said that someone had said that she had worked with my mother and was very upset that she hadn't known.