[LAU] timemachine bug

when I connect the output of Audacity to Timemachine _by hand_ using Patchage there is a delay in the stereo sound file between the start of audio in ch1 & 2 which is equal to the time at which the connections are physically made to timemachine in other words: - I create a 10 sec file of 440Hz sine in Audacity - play it back on loop - go to Patchage and connect ch1 from PortAudio (which is actually Audacity) to Timemachine wait 10 seconds then connect ch2 to the other input of Timemachine - hit record on Timemachine wait a couple of seconds - stop record on Timemachine - stop playback of 440 sine in Audacity - open the sound file recorded by Timemachine in Audacity - look at the start of the sound file - there is a delay between channels seen in the sound file equal to the time I waited to connect ch1 & ch2 side question: why do the outputs of Audacity appear as PortAudio in Jack? is it a reference to virtual ports being instantiated when playback occurs in Audacity?