Spotted this in a lobby (clicky for more dots):
I know no more than you do about the situation, but I’d lay long, long odds Hannaford created the poster with a more recent version of Microsoft Word (or whatever) than the recipient organization has available, making the file essentially read-only.
Not casting shade on ’em; sometimes, you do what you gotta do.
FWIW, I’d expect LibreOffice and any Microsoft Word version other than the exact one used to create the poster to mangle the formatting differently. Been there, done that.
The Smell of Molten Projects in the Morning 
I wouldn’t go looking for technical reasons when simple laziness/ignorance will do :)
Or desperation. I’d vote for desperation, having resorted to it myself on occasion. [heavy sigh]