What distributor and EST module is in the engine?

Here's a way to check the timing at all RPM and remove the MAP axis. Click the top left box of Spark Advance timing table to highlight all, Function, choose Fill with Value and type in 20.00, Execute. Now your entire timing table is 20.00 at all RPM and all MAP readings. Makes it easier to see what EST module is doing at all RPMs.

Now when you check timing marks with timing light it should always read 20.00 + whatever distributor is set to.