Yes.
I tried doing that back when I was designing the store, but it was too complicated and I abandoned it.
Oops. Fixed in v.157 
Bug
It does for me 
Please don’t go back and add to your posts after I have already been through them – it makes it very confusing for me.
Changed in v.157 Idea
Because that’s the only way I can make them disappear to make room for the second croissant. Barriers can only have delayed disappearance if there is only one set.
No
What? Minibosses were never allowed on that wave.
Mmh… I had a look and none of these appear to be serious enough.
Hmm, yes. Changed in v.157 Idea
(to be continued)