When selecting a custom skin, the last step is to pick which model to use with the skin: Alex or Steve. On the screen where we make this selection, beneath the two model choice you see "Custom" and "Browse" instead of "Alex" and "Steve". This is probably a string indexing issue.
This has also been reported in the G+ community and I've attached a sample screenshot from another user's bug report.
Confirmed on Samsung Galaxy Note 3. Android 5.0