I see what you're saying, but at some point do you have to loosen up a little to keep yourself steadily staying in the same position? I'll get a good chip lead and be in the top 15 then go crazy card dead and end up being right around the bubble. It's not that I loosen up and lose all my chips, it's that I just never win much after the initial part. Any advice for that?
Alright the main problem for this is you are playing too tight. If this ever happens, you must loosen up when in late position in any given hand. More than likely you will find folds as you have been playing tight. This maintains your stack. Also try to analyze you're opponents and how they play in each position. Try to figure out their ranges, and catch their bluffs. Timing is always a factor, you must figure out how they time their hands. You can
bluff by deducing how the opponent perceives your hand vs your range. Rule of thumb in lower stake tournaments is usually not to bluff if you believe your aggressive opponent has mid to high pockets in their range despite possible draws, as they are usually too hard-headed to fold.
To summarize, yes, you are loosening up, but you are also playing smarter by adding more dimension to your game. Try your best not to look at the average or the top 10, as tedious as that may be. Instead, try to focus on your stack vs. the blinds. Do not look at the stack of the other players unless they are 5xBB > their stack.
Hope this helped a bit, I am always looking to improve my late position game. Good luck!