Another oops

Ok so I’ve been doing crochet and watching telly instead of my house pottering.  I’ve managed to finish one side of the thingy I’m doing.  Well when I say finished – it is finished but the shape was looking a little bit -well um- wrong.  It seems I should have 16 shells on the edging but I have 18.  I think a rip back to where I know I was correct and see if I can take it from there.  I’m relieved it’s wrong ’cause that explains why it doesn’t look right.  I’m not even sure that makes sense!!