kick harder....false neutrals are usually driver error. and it sounds like you may be kinda short shifting...like you like the sound of your pipes lugging it a bit. but maybe your shift lever is at an angle where you're losing some leverage after 4th gear.
it does happen mostly in traffic so i am usually trying not to eat the ass of the car in front of me and not really focusing on my shift throw. i don't like the sound of my engine lugging but i have never had a tach on it. and i don't want to blow it up. so i shift up whenever it feels like its way up on rpm.
TT is wise....a whole lot of shifting problems are due to not stroking the shifter properly...I still do it myself...leaving some pressure on the shifter between gears and not letting it return to it's "rest" position. It's a rachet, so you have to release it completely between gears.
well my vans didn't last very long riding my bike around. toe dragged the ground a few times and they were done. i am wearing th newer style skate shoe w/ the really soft tongue. strangely they are less comfortable than my old school vans were. but i think focus on a harder pull on the lever and it should stop.
well the damn things a six speed, and 5th is the first overdrive ratio. actually since i have been letting the rpms go up a bit while driving everything has been doing better. i am finally getting a tach, so likely a lot of issues will be solved