Question about translated phrases being overwritten at each re-import of product

[Wachtmeister]

Hi there,

i use a plug-in from vb.org and translated all the phrases for this plug-in.

Unfortunately all my translated phrases are overwritten with every update for this product. When checking for unnecessary phrases in vBulletin i get all my translated phrases marked as unnecessary.

Is someone able to tell me (and the author of this plug-in) what goes wrong here? Does it have something to do with the order of the original phrases in the plugin-xml? (those were changed)

To be more specific:
The plugin uses a phrase called plugin_name_welcome = "Welcome"
I translate this to plugin_name_welcome = "Willkommen" for the german language.
After upgrading the plugin with checked "overwrite" box i have one unnecessary plugin_name_welcome = "Willkommen" and one untranslated plugin_name_welcome. So plugin_name_welcome is again "Welcome"

This did not happen with other plugins. Must the author change somethnig in his plugin?

Some help would be very fine.

Thanks, Wachtmeister