Vogue 8903 - Buttonhole Madness!!!

Saw this pattern last summer and found a challis that I really love. Started it - stopped - restarted - and now am almost finished. I'll review the pattern when I've completed the dress but the buttonholes just made me MAD. I've used the memory for buttonholes on my Bernina 440 for same size multiple buttonholes, but not this time. I put the first one into memory, stitch 2 more - then the machine would go into reverse and not stop! I'd re-stitch a sample, without or with success, cleaned and oiled the foot, clean the machine above the pressure foot (with Windex on a cotton swab) and changed the needle for good measure. Slowly, I could stitch 1 or 2, and then it would go awry. Into a dressmaker's life also comes a lot of un-sewing - I had to rip out 2 half-stitched buttonholes from the dress. Completed all 11 - still don't know if it was the buttonhole foot, interfacing, the machine or the fabric???

 

 
BTW, I really like the metal buttons -