Gold Seadog Missions Low End Loot

Last weekend, I planned a long solo-grind on a Brigitte. I would basically just gather as much loot as possible and complete as much voyages as possible and just hand it all in at the end. All of my voyages were Gold Seadogs for the gold hoarders. My first voyage only gave me one map quest to complete, and the map only gave me one chest (a Seafarer's chest). At first I thought it was multi-chapter but after finding the chest, I got the "Voyage Complete" stuff on my screen. My second voyage gave me 2 maps, both of them giving only a Seafarer's chest each.
Luckily, my third voyage gave me 5 maps that turned in a considerable amount of loot at the end. Anyway I'd like to know if anyone else has been experiencing this problem. I won't report the bug unless it happens again however. See you on the waves!