The system incorrectly counts up the "active substitution days". I have an account that has 34 "exist days" and *36* "active sub days". This is obviously an error and Origin/EA have been notified, but have not acknowledged the error or fixed it.
When you exceed the 50% rule, you cannot substitute for an *unknowable* period of time. Yes, Origin/EA knows when the violation penalty will end, but you will not be told. During the penalty lockout, people can send you their sub requests and you can accept them, but you cannot log into the sub accounts. The substitution restriction is wrong on so many levels that it needs to be completely eliminated from the game.