LPS,
first of all i did not say: (posting an application on the day their permit expires).so please do not put words into my mouth,i said it has to be posted marked before the expiry date of your current document.the date of receipt is in effect only for permanent resident applications also referred to as (lock in date).for temporary residence applications its the date it was sent.
i have seen few people who applied for extension one day before the expiry date of their work permits and their applications reached cpc-vegreville few days later then their work permits were normally issued and it says under remark(temporary residence status maintained).
im speaking from experiences and veryyyyyyyyyyyyyyyyyyyyyyyyyy sure about my information.
LPS,if you have trust issues,then it will be hard to discuss with you.
best regards,