Duplicate Cache and SEO

Hello,

I installed WP Super Cache when I created my website (one month old now). It worked perfectly and at certain point (I couldn’t tell where exactly, I have tried to uninstall every plugin with no change so far) it started to show duplicate cache. I mean when I test my cache it shows the following:

Fetching https://www.dawayingles.com/ to prime cache: OK

Fetching first copy of https://www.dawayingles.com/: OK (1.html)

Fetching second copy of https://www.dawayingles.com/: OK (2.html)

The pages do not match! Timestamps differ or were not found!

I don’t really understand what it means. Is this bad or dangerous for google (I mean, is it sending a red flag to search engines or indexation?). I checked my google webmasters tools and everything seems perfect, and so does my Page Analysis on GTmetrix, YSlow, etc.

Thanks a lot in advance.