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It's been fluctuating but it keeps on returning to 99% health...

Might give it until Saturday and calibrate it while at work.
 
You are meant to calibrate the battery fairly often. So it will do no harm to calibrate it now anyway. But yes i think that there is a problem since the health is fluctuating so much. After 2 weeks use and such a low amount of cycles the battery definitely should not be below 100% health.
I have had my macbook since November and have 95 cycles and the health is still at 100%.
 
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