backend language setting effecting product layout

[zebrafilm]

We have a website with Dutch , English and Portuguese languages installed.
VM2 has only English and Portuguese used for products.

When an admin uses English as a backend language it all works fine but when we use Dutch as backend language and try to change things in VM it completely destroys the whole coding.
Its the same for the English and Portuguese language articles.

I have seen kind of similar issue when using JCE a while ago but now we tested with the standard tiny and still have this issue. It removes every table, end of line etc so all text gets all behind each other without any coding.

Any clue what to do and why this is happening?
My clients want their Joomla backend menu's in Dutch but still be able to work with other languages in articles/products.

Using J 2.5.8 / PHP 5.4 / VM2 2.0.6 -2.0.14

[zebrafilm]

Although it is pretty urgent to get this solved. (client now wants other component) I have found that switching the user to Super User also stops the problem with the disappearing tables....
Really hope that I am not the only one or that there is a solution soon.

Don't want to rebuild that site again....

Thanks,

Bastiaan