The larger arrow pointing down (or to the right when collapsed) makes sense.  But what's the extra one for?  Bug in aesthetics?

 

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.

 

This issue has been resolved in our recent 4.7.14 release of the platform. Please upgrade to resolve the issue, and if you see any further problems at that point, please let us know.