As far as I'm aware there are Astra 2A, 2B and 2D + Eurobird 1. There is certainly a difference in position between them all.  The latest meter I use allows aligning more accurately on the individual satellite and 2D is definitely a bit away from the other Astra satellites in the cluster.  Signal levels on 2D vary about 2.5dB between the vertical and horizontal polarization, on a 1.25m dish I generally get around 11dB to 12dB from 2D, 2A and 2B are much stronger around 16dB, Eurobird around 11.5dB. Depends a bit on location/weather.

If you have a 1.2m dish and are suffering breakup then it sounds like;
- it is out of alignment
- the LNB is not set up properly or is noisy
- the receiver is losing sensitivity (going deaf)

I'm suprised there is such a vast difference between here and Vinaros though.  I'm due to align a dish in Freginals next week so I'll make a note of the values.

Nigel