We found that the current version of UCI ignores the settings in Show Selected Views on lookups. This was tracked at Microsoft within ticket no. 119081222000757. The support asks me to suggest it here as well. As these settings work inside the "old" web interface I would expect that this is also effective in UCI. At the moment only one of the selected views is used and a user can not change to another of the configured selected views.
I personally would consider that as a bug.
Category: General