I'm the developer of Shortlist
Short answer : No.
Longer : Yes, but it takes extra work
Outputting repeated entries in the same loop is possible at the template parsing level, but is explicitly prevented by the channel:entries template parsing method.
The specific part at which channel->entries() does it's duplicate checking and removal in the build_sql_query() method, around line 2717 (in 2.9.2). That is their safety catch to stop repeats.
If you needed to do your own thing, you can, but you'll need to do a lot of leg work to get around it. To do that you'll need to load up a Parser instance yourself and pass it the entry data directly.
Note - Prior to 2.7.x this was simpler, and Shortlist did have an implementation that worked around things, but with the abstracted parser there's a lot of extra leg work to get it working.