Sorry for the length of this post. I start out intending to keep these short and sweet and they end up looking like legal "briefs" (sorry redman).
I appreciate the concerns about the weekly rankings and "cheatsheets". I don't do the projections and have refused to do them (

sorry Norton) on more than one occasion because I think the number in the leftmost column can be EXTREMELY misleading. I get that oldmandrummer isn't interested in the arguments why so I won't rehash them again. From my seat, having seen at least four different ways of producing an IDP weekly cheatsheet, there's really no way to make that leftmost column any more meaningful or accurate within a given tier. I've seen the spreadsheets and databases that Norton uses to do these projections. I believe that the trend data they provide allows him to squeeze the most out of the stats available.
Why do the rankings and cheatsheets? Because the masses want them to help make close decisions. I appreciate that too. Were they mine, I'd insist on a three paragraph, not-so-fine-print, disclaimer on the top discussing the limitations of them.
But this post isn't about the cheatsheets. I'm happy to expound on the above if asked. But, in true Bill Cosby form, I told you the story above to tell you this one.
Folks talk about things like "Any Given Sunday" and refer to football as the ultimate team sport for a reason. There are an inordinate number of variables. 500 page playbooks. Specialists on both sides of the ball. On average, 60 plays from scrimmage in any given game to decide an outcome. Injuries, a single big play, etc can change the feel of a game quicker than Britney Spears can ruin a career. A sport with that many variables leads to significant volatility in one week statistics.
To make a gambling analogy, the expected value of placing a bet with a +10 count in blackjack or with top set on an uncoordinated board is high. But not foolproof. Variance happens, and it's more of an issue with small sample sizes. Gamblers, as fake football owners must also, have to learn to accept and ultimately embrace variance. If you're convinced that you've made the right play, don't question the outcome. Find a way to exploit the advantages as best you can, but don't become results oriented.
What effect does variance have in fake football?
Leagues that use fewer starters are going to be subject to higher variance. Players that don't touch the ball often are subject to higher variance. Players who aren't in a defensive position that provides maximum opporunity are subject to higher variance.
To borrow a phrase from oldmandrummer, none of that is rocket science. But it's seriously underappreciated.
Want less volatility and variability in your weekly scores? Avoid big play WRs with low target numbers. Bump the value of a running back who will be on the field running out the clock in close games and catching dump off passes in blowout losses. Look at defensive ends that are two way threats. Ignore all but the best tackling defensive backs. Don't risk multiple poor weeks on 3-4 OLBs.
Have a weekly matchup against a team full of studs? Make that volatility work for you. Search out boom-bust talent in a great matchup. Shoot for a huge week with multiple players; you don't have to hit with all of them but one or two season high weeks will win a game you shouldn't have competed to win.
Your team has the lineup full of studs? Consider your risk tolerance. Use a boring player if your in a tough decision or accept the risk of the big play option knowing you've got a buffer.
If you're relying on us to make the confidence calls for you, consider the following:
In FBG scoring, only two DBs finished in the top 12 in both Week 8 and 9. Zero finished in the top 12 in both Week 7 and 8. Zero finished in the top 12 in both Week 6 and Week 7. The second overall linebacker, Barrett Ruud, has had two weeks with less than five fantasy points. The third overall linebacker, London Fletcher, has had three weeks with less than ten points.
Outside of Tom Brady, there has been no player that is a sure thing every week. Volatility is a part of the game.
I'll reiterate the suggestions I made earlier in the thread. If you don't like volatility, you have options.
1. Find the most consistent option you can roster, ignore the cheatsheets, play him every week and forget it. Move on only when there's a clearly identifiable reason -- injury, position change, obvious decline in ability.
2. Trade multiple above-average players for a consistent stud wherever you can, depth be damned.
3. Convince your league to add more lineup slots in the future. Use an offensive flex, add IDPs, add IDP positions, etc.
4. Get in more leagues.

Seriously, you can't have bad luck in all of them, right?
If you don't like volatility and can't adjust to the conditions, find another hobby. If you'll indulge a story about two of my leagues, consider that a dynasty team that began the year with Brees, LT/LJ, Evans/Holt/CJ/RWilliams, Witten, WillSmith/VDB/Bulluck/ZThomas/Ruud/Fletcher/AWilson/TPolamalu among others is currently under .500. In another league, an owner who has scored more than 200 points than anyone else in the league STILL has the highest points scored against.
Variance and volatility is the 12th man of fantasy football. Learn to love him.