This would happen to me too at times, refreshing the page has always worked for me, although it's a pain having to redecorate. Also, if you're finding yourself having to refresh a lot, you could try clearing the cache from your browser, it'll help the game run a little bit better.
If you're using the HTML5 version, then that would explain why you're having trouble with decorating. If you're using HTML5 and experience any problems playing the game, there's a thread on here on how to opt out of HTML5 until it's fixed!Hope this helps!
