We are aware of this problem and programmers are trying to solve it. We can't promise, however, when it will be solved.
In general you can report bugs or ask questions through this link:
http://www.bewelcome.org/feedback.php - you can normally also get there with the 'Contact us' Link on top of each page, but unfortunately there are some pages, where this link doesn't work (e.g. the Forum page...)
Anyway, thanks for telling us and we hope you still enjoy BeWelcome !