Gary, the Ilford ULF film was offered only through a small group of resellers who agreed to participate and thus should have been aware of what was available and what wasn't - and that has been my experience working with several of them over the years. As David pointed out, in the past there have been some miscommunications associated with last minute decisions by Harman about whether or not to include particular emulsions in particular sizes in the offer in response to late-arriving requests.
Anyway, it's impossible to know what, if anything, to make of this without more details. Were the orders placed with participating resellers? Was there any effort to contact either Wynit (the US distributor) or Harman directly to find out what was going on?