Does Reflex frame-limiter limit every frame duration greater than the specific time？

For some reason, I need to limit every frame duration greater than the specific time, e.g. 16.66ms when DLSS-G is on. But what I see is, In some frames, Reflex does't sleep enough time so that make frame duation less than 16.66ms, e.g. 14.06ms. Did I misunderstand about Reflex frame-limiter's mechanism, will it sleep less time for frame pacing or reducing latency?

Another question, does reflex marker, e.g. simulation/submit/present influence the sleep time when I set Reflex frame-limiter to 16.66ms. I note Reflex SDK Integration Guide says in 2.1.2.3 that "latency timing information that is gathered by these time-related functions does influence the Reflex Low Latency mode logic timing in the driver when Boost mode is enabled".

Start with the Reflex frame-limiter integration and the Reflex SDK Integration Guide section 2.1.2.3 mentioned in the report. Compare the observed frame durations with the configured 16.66 ms limit and the simulation, submit, and present markers. Done means establishing whether the shorter sleeps are expected and documenting or correcting the behavior.