Thanks Buzzman for the info and glad to know that you could flash back to the other ROM. I do not understand Linux and android that well but the inconsistencies in our experience make me think that it does have the problems of some short of residual data on those partitions, something like task29 or hard reset in windows mobile. Thanks for the heads up for link2sd, I am quite tempted to try that but, its my son's tab and he use it for some of his studies also so I guess I will hold it for sometime. It has been so stable that he has never complained of a single FC or freeze and has ton of memory free. However, link2sd seem to give more flexibility. Here is snapshot of my memory use.
@Cretos, glad it worked for you.
@Cretos, glad it worked for you.