Based on the examples I've looked at I am under the impression that the attached configuration XML DemoJob.xml (generated via jenkins-job-builder 3.2.0), which contains, in part:

<value>a|b|c</value>
<multiSelectDelimiter>|</multiSelectDelimiter>

ought to be giving me a list of 3 choices, 'a', 'b', and 'c'.  Instead what I get is a single choice 'a|b|c' 

Am I misunderstanding what's supposed to be in the configuration or is this a bug in the Extended Choice Parameter Plug-in?