Can not Sub for others

"EE_Elephterion;c-2130466" wrote:

You say it was active for half an hour at most, and then has been ended and re-issued again for the next login? Or just logged out without ending the substitution? That is the difference that matters in this case.

person 1 sends a substitution to person 2,
person 2 enters and looks around at forgotten bases, for a few minutes, no longer than 30 minutes
then person 1 logs into his account and cancels the substitution when entering, pressing the cancel button

these steps repeat with different people instead of person 2, let's say every other day, for a couple weeks
that makes 7 times 30minutes that's 3.5 hours of total substitution time
the rest of the time the account is actively played by the owner - person 1
and then some person 3 sends substitution to person 1 and person 1 wants to accept a substitution,
person 1 gets the message that his account cannot accept and use substitutions from anybody because his own account of person 1 was substituted for 22 days or 18 days (reportedly) out of 30

now i'm thinking, of two possibilities,
one possibility of a bug is maybe if person 1 logged in and kicked the person 2 out, person 2 did not click the cancel button, and the substitution is counted as continuing even though it's not
another possibility of a bug is that most of the time person 1 sends emergency sub to a centralized sub account for the whole alliance, which never gets accepted, but maybe still counts as a sub all this time
either way this is not how it is supposed to work