Hello @softdecors

Welcome to Steemit.
Wishing you smooth stay here.

I have noticed that you've downvoted yourself by pressing on red inverted arrow

Thats 👆 how a downvote would looks like. As can be observed, you have a '-' next to your name.

The encircled inverted green arrow signifies upvote which is done in appréciation of quality content
The red one next to it is downvote which signifies discontent on post deemed unworthy.

Also voting for one's self is discouraged since it doesn't promote quality Content Discovery. You tend to earn more curation rewards when you partake in what is called Community Judgement.

Follow this post by @sapwood to understand how voting and curation works.

Best regards,
@cherub27