Seems to be common that bergs will not find neutral easily when the engine is running, mine is certainly tricky as is my mates 2008 berg. With regard to the dodgy gearchange it may be worth taking the clutch cover off and having a look at the selector drum and the selector lever, I've had these come loose on other bikes before now. The lever that turns the drum can wear or become burred up. Otherwise it could be the selector forks within the gearbox which can also burr up or bend, this is a much bigger job I'm afraid.
