Tab-tab to get a list of commands, not working properly when using multiple instances of Vorpal

Hi guys, I recently found what I think is an undesired result when using tab-tab to get available commands while using multiple Vorpal instances. Using the exact example on the Vorpal page(http://vorpal.js.org/) (customization example), if you simply create two lists of commands to use via .use, and run the below you will get all of the functions for all instances and it will essentially display the delimiter and each instances commands for as many instances as you have. I've been trying to debug this for a day or so now, any feedback would be great:
Example:
const Vorpal = require('vorpal');
const chalk = Vorpal().chalk;
const unicorns = Vorpal()
.delimiter(chalk.magenta('unicorn-land~$'))
.use(require('./commands/campaignModeCmds'))
.history('unicorn-command-history');
const narwhals = Vorpal()
.delimiter(chalk.cyan('narwhal-land~$'))
.use(require('./commands/dataModeCmds'))
.history('narwhal-command-history');
unicorns
.show()
.parse(process.argv);