Again you are doing the same mistake. In ax.plot first argument which is X values must be the same size as the second one - y values. It must be timestamps from your file.
time
should be used only for xticks.
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs