The issue of OS X 10.11.1 file shares being mounted as both SMB and AFP could be pretty common, but not recognized, because….
1 - Many (perhaps most) users don’t have the Finder set to Show Connected servers on their desktops. So they would never see both icons.
2 - Even when the file share is mounted as both SMB and AFP, the Finder window Sidebar only shows the Sever name, not the specific folder being shared.
FWIW I stumbled onto the SMB & AFP dual mount issue (bug, glitch or feature) while testing a bug in Quicktime Player where edited videos are visible in the Finder when saved to a AFP share, but are hidden if they are saved to a SMB share. BTW they are not hidden via the Unix convention (i.e. .filename) as confirmed via the Terminal.
The test goes like this….
1 - create a folder on the SMB share.
2 - open this folder using the Finder desktop icon mounted as SMB (Get Info to check SMB vs AFP)
3 - open this folder again using the Finder desktop icon mounted as AFP (keep both the SMB and AFP folder windows open)
4 - open a .mov file with Quicktime Player and make a simple (repeatable) edit
5 - close the .mov file and use Default Folder to select the folder opened from the SMB share
6 - save the edited video as TestSMB.mov
7 - open the same .mov file with Quicktime Player and make the same simple edit
8 - close the .mov file and use Default Folder to select the folder opened from the AFP share
9 - save the edited video as TestAFP.mov
What I end up with are the following files — TestSMB.AAE, TestAFP.AAE and TestAFP.mov. Get info on the folder shows that it takes up twice the space of the TestAFP.mov. This discrepancy is because the TestSMB.mov file is hidden.
—GetRealBro
