Rotor and Cap Continuity?

Ok..real dumb question. Very embarrassing to me!

Why don't I measure continuity from cap hi-tension port to spark plug ports using my FLUKE (OHMS) scale when rotating shaft/gear? Distributor is on bench, clamped in vice using adj plate, rotor and cap installed/assembled.

Two styles of rotors, one "angled" contact and the other "stepped w/ horizontal contact" installed. Both rotors show NO CONTINUITY w/ cap light-brown (original) cap installed. Different caps also tried, same results w/ ea rotor. Positive contact assured w/ FLUKE and meter is GOOD. Also noticed that shaft can be "pulled" up/down very slightly, even w/ rebuild distributor and in OEM distributor (p/n 2875199) which was removed because very worn (varying dwell). Up/Down movement must be causing this no-continuity but not when installed....right???

Pls clarify and/or explain ...basics are not making sense to me.

A-Body forum is the best...dist being installed today before snow flies!!!!