Looks like you have some goodies on this machine...
Press the start button 3 times when the "skeleton fish" is crossing the display. This gives you a Fishbone bonus worth 10 points.
The person in the displays during the 10 point Fishbone bonus is someone named Russ who went to school with Dot Matrix artist Scott Slomiany. Reported to be an avid fisherman.
Stuff on the backglass:
The fishermen are artist Pat McMahon and designer Mark Ritchie.
The cap on McMahons´ head has "MAX" on it, a slightly used nickname for him.
The fisherman in the water filled waders (wearing a baseball hat) is Carl
Biagi - a Mechanical Engineer on many of Steve Ritchie's games.
The man being thrown out of the boat has "DUCK" on his right shoe.
The man being thrown out of the boat has "SKALON" (mechanical man Jack Skalon) on his left shoe.
There's a beercan just above and to the right of the second boat with CG (Chris Granner) on it.
There's a bag in the boat with the initials MP (Mark Penacho) on it.
The worm is Jim Patla. "It kind of fit his personality at the time" -Brian Eddy.
On the side of the boat it says "imadv8" meaning "I am a deviate".
The name of the boat is "Crazy Johnny", named after John McMahon (Pat´s brother?).
Stuff on the playfield:
The plastic lightshield near the right fish-targets shows a bug with a parachute. On this parachute "BUZZ" is written and a "3".
There's a "3" on a plastic lightshield near the left outlane, it shows a fake fish with hooks attached to it. These hooks are double hooks, forming a "3".
But not the issues you described. Does it drop when you hit it like it's saposed to?