Bash Ctrl-A Returns to Start of Line but Doesn't Display Properly
Add \[ and \] around the colour codes to enable bash to calculate the line length correctly. Something like this:

PS1=\n \[\e[1;95m\] \u@\h \[\e[0;32m\]\w \[\e[1;30m\] $(__git_ps1 " (%s)" ) \n \[\e[1;95m\] \@ \n $ \[\e[0;30m\]


(This answer is taken from @Mark's comment on the question.)