Strange Problem

[BigAMcInroy]

I am new to Audacity
This weekend I recorded a lengthy public presentation.
People speaking to an audience.
Somehow the track for Sat afternoon also contains Sat mornings track.
While I playback the afternoon recording, I can hear the morning session.
Sat morning is fine.
Also both morning and afternoon sessions Sun. are good.
I don't know how I did it.

Is there a way to separate the two?

[BigAMcInroy]

Unfortunately I think I found my answer in another thread.
I must have left the morning session open, even though I had exported it to an mp3.
Then Sat afternoon both were open, and when I exported, the two blended together.
Sigh
I certainly won't make that mistake again!