Source Argument for LAMS

[fbalexpark]

Has anyone used the source argument for LAMS?
I’m trying to run LAMS with this source argument:

--source **/{first_view.lkml,manifest.lkml}

but it only reads the first file, not the second one.
And if I switch the order of the files like this: 

--source **/{manifest.lkml,first_view.lkml}

 , then it reads the manifest file but not the view file
Not sure why it’s not reading the files after the first one - is this a bug or am I doing something wrong here?