The AUTOLAND warning light activation conditions are pretty clear (FCOM 4.05.70 p15). This system does not take any input/entry information from the MCDU.
As long as CAT2 or more is displayed on your FMA, your aircraft is AUTOLAND capable whatever you have inserted in the MDA/DH field (for auto-callout purpose).
The only reasons I can think of is the poor ILS beam quality and/or the topography of the ground before the threshold that could lead to an AUTOLAND warning but not an MDA entry.
The RWY you used with your previous employer, was it a CAT2/3 RWY?
Furthermore, Airbus recommends to use CAT2/3 procedures even when carrying out an AUTOLAND in CAT1 conditions, i.e. setting the DH and visual references acquired by the CAT1 approach MDA.
Am not aware of any change on the AUTOLAND warning function, but it does not mean it has not evolved since 1988!
