Hi John
Looking at the pic you still need to sand a little more.There is still a little bit of a kink present.Uwe was referring to the bottom shape of the bulkhead making it look too high.The profile of the bulkheads do not flow smoothly under the waterline in this area.If you spend a little time just laying a planking strip across the bulkheads,you will spot the discrepancy.It may be an idea to check over the whole of the hull in this way.it much easier to address before you start fixing planks in place.
Kind Regards
Nigel