If you buy the stock at 10 a share because it has a good dividend, and the stock drops to 8, it's doubtful the dividend is enough to make up for the decline in the stock.
100 shares is 1000 bucks. Say the dividend is 3%. At 8 bucks a share you've lost 200 bucks, and it'll take years for the dividend gain to offset that stock value loss. The good thing is generally dividend stocks hold their value better than non dividend stocks.
But it's quite possible to lose money buying Dividend stocks if they go down, like ORC for example. You also need to realize, and you probably do but many don't, that when a stock goes ex dividend, the stock price decreases because they have to cover the payout of the dividend. Lots of people that buy dividend stocks because they hear it's a good idea, panic and sell them when they see a "strange" drop in price for no apparent reason one day, when all it was is the stock went ex dividend.
What you're doing is very likely a good idea you named some very good dividend stocks, I'm just saying it's not as simple as comparing the % of the dividend to the % say a CD is paying, because the CD can't go down in value like the stock can.