I think the reason you are getting 2 different numbers if because you are rank 33 and not rank 35, trying to do r40 leves. I could have sworn somewhere, that they raised the level they unlock to the 5's (15,25,35) from the 3's in order to make it uniform with DoL leves. If you didn't already have another job higher than your 33, I really dont think these leves would even be open to you yet.

I think I also read that completing these leves outside of that 5 level gap (34 and below for example on a r40 leve) would yield less reward via completion bonus at the end. Your shield level is high enough to qualify for full bonus so maybe that is why you are getting the full amount?