Hi @Brotsky_Pixie,
Hmm… reading through your code, I have noted that your are using this code to get a value from an options page $choices = get_field('venue_name', 'venue', false);
. Change it to the following: $choices = get_field('venue_name', 'option', false);
For more information on this, have a look at: http://www.advancedcustomfields.com/resources/how-to-get-values-from-an-options-page/