Ticking "Make this user an administrator", manually removing wheel from the groups field in the advanced settings, re-selecting "Make this user an administrator", then opening the advanced user settings again causes the entire install to crash. I can reproduce this everytime on Fedora-Live-Workstation-x86_64-22-3.iso The installer has already begun partitioning disks and copying data, so this is a very bad time to crash. It will easily create un-bootable disks and incomplete installs. It does not exit nicely, starting Anaconda again will crash when it attempts to partition the disks, unless the system is restarted.
In the future, please attach the logs from /tmp to anaconda bug reports. This can be done automatically with the built-in bug reporting tool. *** This bug has been marked as a duplicate of bug 1226564 ***