Translation deleted after saving

We currently have the following problem with the plug-in:

For our website we only chose two languages german and english.
At first we’re entering the german text in our new blog entry, after that we’re entering the english version. As soon as we’re saving, the english text is deleted completely, but then display in the german form. The german content is completely gone.

We’re using the charityHope theme. It worked until january, since then, it doesn’t work anymore.

Can you help me with this topic?

Thank you.

The page I need help with: [log in to see the link]