Accuspark distributors seem to be quite bad quality. The electronical components itself seem fine, but the distributors they use seem quite bad.

New distributor arrived against warranty and same problem again. Initially everything was working fine, but after giving a little bit of a rev the engine died with an interesting sound *click click click*.
Rotor arm again was pointing way late. After lifting the dizzy we made some measurements. It seems that the gearwheel is just slightly smaller than original (maybe just two tenths of a millimeter, but still) and there is actually some side play in the bearing.
The only sensible theory we could make out of this, is that the side play with the smaller gearwheel allows the gearwheel move enough so it jumps few cogs! Of course this makes the timing late and also explains the weird sound.

I'm now considering of sourcing an ORIGINAL Pinto dizzy and converting it to pointless with the electronic components that are in the "new" dizzy I got from Accuspark. Or a refund.

Anyways, car is now running fine again, with the original dizzy.