First off, JC's and some of the other suggestions, probably saved you from worse than bad casting habits......... NOT,going over to Lord Hise's, no doubt saved you from lowering your standards, down to "fish kicking" instead of casting. (He'll explain that to you, glady).
Second, "helping with casting and not standing right next to the person asking the questions, is like improving a golf swing, while talking on the phone.
But, a few things, come to mind........... "Your rod's been repaired with "JB Weld"!? How long is the leader and what weight/size is it, that keeps "piling up"? What type, age, weight, design line are you casting? A #8 fly isn't all that big, for a 7'6" 4wt. but how heavy is it, compared to leader/tippet length and weight? Wind resistant?
"The guides on my rod, don't line up, just right" ??
I, dunno, but it seems, by what you've described and asked about, there's a lot of "variables" left unanswered.
By the way, another "variable",..."How long have you been fly casting and did you have any good instruction,when you started out"?
Saint Paul-"The Highly Confused"
You cannot do a kindness too soon, for you never know how soon it will be too late.
-- Ralph Waldo Emerson