How to interpret/use "Fix Minimums" (at KALB)
The 620 is not at WESTS.

It's been discussed in multiple places, e.g.:


https://mooneyspace.com/topic/19113-ifr-fix-minimums-question-kipj/
https://www.pilotsofamerica.com/community/threads/fix-minimums.28308/


The way to read it is [WESTS FIX] MINIMUMS, and not [WESTS] FIX MINIMUMS, i.e., the 620 is not at WESTS, but the 620 is when you can identify WESTS (having DME on board for the L-DME in your case).

But let's check the AIM (5-4-20):


  When a fix is incorporated in a nonprecision final segment, two sets of minimums may be published: one for the pilot that is able to identify the fix, and a second for the pilot that cannot.


Another reason could be:


  Two sets of minimums may also be published when a second altimeter source is used in the procedure.


An example for that would be the KIPJ ILS Y or LOC Y RWY 23.

Of course when in doubt, contact the FSDO.