Apps share the 2GB /home partition with other stuff so something else is probably using up the disk space. For example, Modest, the default email app stores emails under /home. Run the following command to find out where your space under /home has gone:

It is better to run this as root as you may not permission on to read all directories but it sounds like you don't have rootsh/sudser installed. You should hopefully be able to get some idea without running as root, otherwise you will need to install rootsh/sudser.

Sizes are in MB. The last few lines should show you which directories are using up the disk space. Remember though that the /home and /home/user totals (most likely to be the last two lines) will include MyDocs in their disk usage.