Why does Zsh correct ssh User@ip1 to User@ip2, and how to stop it?

On Mac OS X 10.9 and zsh version 5.0.2 (x86_64-apple-darwin13.0) the ssh user@192.168.13.2 command traps a correct to ssh User@192.168.12.2 [nyae]. I don't want to disable zsh correction on the ssh command completely. How figure out why zsh wants to make this correct, and prevent it from occurring? Regression: * ssh User@192.168.13.3 also zsh correct to User@192.168.12.2 * ssh 192.168.13.2 does not trap the zsh correct to ssh 192.168.12.2 * ssh User@192.168.13.4 does not zsh correct to User@192.168.12.2 * there is a .zsh_history file of 2013 while zsh is configured for a maximum history of 2000 commands * removing all occurences of ssh User@192.168.12.2 from .zsh_history doesn't improve * both 192.168.13.2 and 192.168.12.2 list as host on tab completion

$ cat .zshrc
setopt correctall