RE:Sector Move Hi HoneyPot,
I think you are spending too much energy focusing on the share price and looking at greener pastures in other companies than looking at your total return that you get from investing in COS.
If you take COS from when it was roughly at it's high three years ago and compare it to the sector (lets use XEG.TO) over that same time frame while adjusting for dividends, COS has returned 5.62%, while XEG has returned -6.6% including all distributions from both tickers.
Of course if you cherrypick one or two Canadian energy producers and compare them to COS you may end up getting disappointed, but you have to compare to an index, don't compare to an investment that you didn't make or else you will go crazy (as you seem to have already done).
If you had been DRIPping your COS shares through your brokerage during that period the difference would have been even greater. Even with the collapse in COS's stock price, reliability issues, CAPEX etc. COS has still outperformed the broader Canadian energy market over that turbulent time frame. You can't ignore a steady 7% yield!