if i have the 300 message texting add on and i want to switch to the 1000 texting add on and ive used about 200 texts would i only be left with 800 texts because i already used 200? and if i change to the 1000 texting add on before the monthly cycle, would there be a different cycle for texting? (ex. if i get the 1000 text add on on 5/14/10, would my cycle be on 6/13/10 instead of my usual cycle for minutes? would i have 2 cycles?)