The NYT is saying that some Malaysian government officials are confused about how ACARS works, leading to the confused reporting.
The above comment is accurate: the last ACARS message was received at 107, and the next one was expected at 137. The voice communication was logged at 119.
the next ACARS message was scheduled to be sent after the goodbye, but it was never received.
the time when the ACARS was disabled would be within this window.