Hi all, I am developing 4x5 negatives with a SP 445, and it appears that I am doing something wrong to make a highlighted area in some of the negatives. I have only developed 3 sets of 4 negatives so far, and I am about to try set number 4.

Click image for larger version.  Name: SP 445 1.jpg  Views: 131  Size: 45.5 KB  ID: 202090 Click image for larger version.  Name: SP 445 2.jpg  Views: 105  Size: 33.6 KB  ID: 202091

Here are the specs:
Ilford FP4+ shot at 125
HC110 (1+31): 9 mins
IlfoStop: 1 min
KodaFix: 7 mins
Kodak HCA: 2 mins
Wash: ~ 8 mins

As you can see, two of the photos have come back with a definite underexposed area. I don't think I am doing anything wrong during processing, but I can't think of anything else I've done wrong to cause this. I do everything in sets of 4. I load 2 holders with 2 sheets each, shoot those, then come back and process the same day. Each of the photos with the problem areas are from 2 separate "batches". As you can see, the other photos are free from problems (other than ones I obviously made elsewhere in the process).

If you've run into this or could shed some light on what I might be doing wrong, I would really appreciate it! Thank you!