yep, this same thing happenned to me; as fast drop to 93%, sat there for several hours, dropped to 74%. then stayed there for several hours, and hit 68 % when I went to bed.Woke up, 8 hours later and it was 66%...
No doubt the phone cant figure out what this giant battery is really doing!
Bottom line, its easy to see that at least 3 days of normal use will be no problem with this battery..BTW, I overclock, have 5 email accounts checking every 10 minutes, gmail, FB, Twitter,and everything else going all the time, in addition to lots of phone calls every day..thats why we have these phones, to USE them!!!