"I am not looking for you."
Did you edit your post? I'd bet the other sentence wasn't there before, but perhaps I was just being blind.
Anyway, it is more complex, several of those are either clitics or are used in the strong position. mě/mne can certsinly used in the strong position. We also have inconstant clitics in Czech. You rarely have definite rules without any exceptions in natural languages.