something dodgey or is this normal on the asx?

For the last few days this stock sat at 0.20c and hadn't moved more than half a cent either way.

I had a 'stop loss' set for 0.195.

The stop loss was initiated and my shares sold for 0.165c which is a significant loss. I realise that you can end up selling for less than the stop loss if there is 'no limit' but this seemed excessive to me

AND here is the kicker...the stock shot back up to 0.21 shortly after? Like within an hour I think.

Should I just wear this as a new trader or should I question it. Any thoughts on what happened would be appreciated...