Unwanted re-entry of all players in the derby and tasks not completing

A member of our neighbourhood (patrijsfarm) complained about having NO advance in her current task (3x riverboat). After completing 3 boats, the counter is still 0..... Her view of tasks is also very strange (repeting tasks and no completed)

Checking the derby, I noticed that suddenly EVERYONE is active in the derby !!!
This collective "reset" is UNWANTED (at least 8 members were not participating in the derby....)

Our neighbourhood = BOER-AKKERTJES E.O
I am M--A--Y--H--A--Y--D--A--Y

So it seems we have some serious problems with the derby ....

Got response from another member. Throwing away the undoable task results in a working derby again (but you loose a task this way)

Please help!