Good news: I was finally able to free the horses who were double-boarded for 10-14 days.
New bad news: The boarding page is reading 0 days for all the horses I boarded last Saturday, Feb. 6th, and their individual pages are all over the place.
Examples:
Fivel - page says boarded for 113 days
Loewe - page says boarded for 91 days
WASP - page says boarded for 28 days