Uptime/Downtime - It's random, but my site is always up?

Hello guys,

On WPMU dashboard, my site's uptime and downtime looks like this:

And the request timeout switches between http and https:

My site always runs fine and I have no problems with downtime. I was just wondering if this means something? Maybe something about the switch to SSL and https security?

- Thank you for your wonderful support. You guys helped me thru a lot.

Best regards