the latest iotdm (Sep14 version) 's mni and mbs have a high possibility that it does not clean contentInstance deeply.

for example, if (current number of instances)cni = 5, then set mni to 1, now we should have cni = 1, however, sometimes we will get 2.

see image:
https://www.evernote.com/l/ASNsNchZKiRMb4wBeaFNY4BV2Asp7zqo-Lg