Cole-cole plot curve collapses when trying to alter the valule of horisontal axis
LTspice doesn't have ohms, farads, etc, in the schematic editor, all it has is units, and they are case insensitive. That is, m stands for milli (1e-3), and so does M. So what you have is a step from 1 to 1e-3. So do not bother adding ohm, it has no effect, you can just write .ac oct 50 1 1meg.

Also, LTspiceXVII orders the stepped values in increasing order, but I don't know if this also applies to .AC directives.