Hi Paul,
the cable on passenger side may be broken in its sleeve so you won't see it, you can try to hand-pull it from inside the car where you adjusted the lever; if it comes off you've found the culprit... You should be able to replace the cable(s) in your garage or driveway: for safety reason it is recommended to install the car on two stands (posts / candles).
Remove the wheels and drums -handbrake released !!- and TAKE PICTURE or MAKE a SKETCH of how the things are fit together, keep in mind there are left and right sides !! You'll thank yourself at reassembly...
- Remove (push & twist) the two spring lockers that keep the brake shoes in place.
- Detach the end of the cable (yeah I know, not that easy !) and pull it off the brake assembly plate.
- lose the cable fixing brackets and remove the cable off the car, install the new one
- clean all the brake components, check for seize parts, fix as necessary
- inspect the drum and grind-off the lip that might have been left at drum entry by metal wearing
- shorten the self adjusting thingy, re-install all components and adjust the self adjuster (wear retriever) so the shoes come to slightly touch the drum
- once both sides are done, adjust the hand brake lever to get 3 clicks at full travel
- have a carefull test drive, the new shoes need to set-in properly
- after a few hundred miles, you might have to adjust the lever once again, this is normal
Hope this helps, regards, Bernie
PS: you should probably create separate threads for separate issues, I'm srprised no moderator jumped in already !
Since your first post we have covered different issues that might have been interesting for others IF they knew that under " my car is lumpy" is hidden other stuff...