Take a look at the position creation function in position/commands.rs: 
/contracts/farm-manager/src/position/commands.rs#L25-L109
Evidently, the position limit validation check is placed near the end of the function:
This means that if a user has exceeded their maximum allowed positions:
QA, whereas the implementation is not broken, the current placement of the validation check causes unnecessary computation and state reads when a user has exceeded their position limit. Moving this check to the start of the function would make the implementation more efficient by failing fast.
Move the position limit validation to the start of the function, right after receiver validation:
pseudo implementation:
