The email password not sticking is a definite know issue. There is a fix. In Installer add the following source:
http://sleeprs.net/iphonerepo. You may also then need to install, from under the Recent Packages category, the Bigboss's Beta/Experiment package.
Once you do, you should see the 113 Mailfix item under Tweaks (1.1.3) category.
Not sure about the bluetooth issue - there may well be a patch for that as well ...