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I see the problem.
On the left, look at the very first peak. Look to the right a little. See how its cut off and suddenly drops?
Did you ever calibrate your battery stats? I don't know if the rule still applies on newer phones but you usually calibrate your battery stats after installing a new ROM on it. The Android technology never shows a "true" percentage of battery power to prevent overcharging it.

Its tru calibration is best new or old but not just the calibration is good its charging and killing that following it.but when you calibrate a battery try to do a fix permission in the clockworkmod ...
What firmware is OP running? Aren't we all supposed to be on D??