cm10.1, galaxy gio : I have problem with "memory full" message after I set DATA mount-point to sdcard no problem with other options ... just with data. what should I do ?! :(

I have an HTC Desire with cyanogenmod 7.2 (with pdroid patch) and with an partitioned microSD card (first: FAT, second: ext3). The second partition gets automatically mounted read/writeable as /sd-ext as it should be. I'm using S2E to store my apps and the app data on this ext3 partition. The mount command shows me that the ext3 partition is not only mounted to /sd-ext but also to /data/app and /data/data. All of them are mounted read/writeable. My first question: Is it normal and secure that multiple directories are bound to the same partition? Are there no conflicts? In the beginning everything worked fine. I could install and use my apps without problems. But after a while more and more apps begun to crash and I always had to restart my phone to get rid of those crashes again. I discovered that the crashes where caused by a read only data partition. In fact all the directories /sd-ext, /data/data, and /data/apps where suddenly mounted read only. My second question: Why does Android sometimes remount my ext3 partition in read only mode while I work with my phone?

I have just installed 4.2.2 PAC and S2E later. I have everything on sd-ext, there's 1600MB free space on sd-ext, and 140MB inside. However anytime i want to install an app, it says there's not enough free space. I have restored some apps with MyBackup Root. I think that was the problem. How to solve it? I don't want to wipe data, I've made some important changes. (system 219MB/220MB) (cache 1MB/37MB)