front fender interchange probs

[LXHATCH]

replaced the fenders on my 87 lx,
had it painted,
went to put the lower fender extensions and mouldings on the lower front of the front fenders,
the fenders have a different bolt pattern
for the extensions, and the mouldings,
WTF?? anyhow, the fenders appear to have a bit smaller wheel opening, than the 87s, '
when i look up fenders for an 87 it says in the mps site that 79-90 are the same,
i know these are oem fenders from an 85 what gives??
thanks, very frustrated.... lxhatch