Possible to add multiple weights in one day. But edit only allows you to change one of the weights

[ararchch]

• Add a person to fitbook at index 2
• Add any two weights on the same day for the person
• edit the weight to a different weight
• edit the weight again
• only last weight is edited, not the first one. First one remains permanently.

Would be nice to warn the user before adding multiple weights on the same day (incase they do it accidentally) because otherwise it is not possible to edit fully.