I have seen lots of mis-clips on caught salmon over the years. It is obvious that the fish was clipped but some residual Adipose tissue got missed. The double mis-clips are interesting. The person doing the clipping realizes they did not get a good clip on it and does it again from the other angle but still does not get it all and when it is healed it looks like there is a low pointed triangle remaining, rather than a large swept back rounded Adipose fin.
When I have volunteered to clip salmon at our local sport sector operated hatchery, we sometimes have children doing it, a good experience for them,but mis-clips may happen a little more often. In the USA they do not have this issue much as they use automated machines to clip most of the hatchery salmon. Our Government won't fund that.
I would like to think that the DFO enforcement guys are capable of identifying a hatchery fish that has been clipped but still has some residual Adipose tissue remaining and give the angler a break. The ones I have seen are always obvious. Anyone ever had an enforcement officer make this an issue?