I have set option "Restrict trigger to the most recent build" to "Yes".

See attached screen dump.

The "Memphis - Release" downstream from "Memphis - Dev #37" does not have a trigger - this works as expected since "Memphis - Dev #37" failed.

The "Memphis - Release" downstream from "Memphis - Dev #36" does have a trigger - this works as expected since "Memphis - Dev #36" is the latest successful build.

But, the "Memphis - Release" downstream from "Memphis - Dev #33, #34, #35" also have a trigger - this does not work as expected since "Restrict trigger to the most recent build" is set to "Yes". I would expect those not to have a trigger as they are not the latest successful build.