I tried to reproduce this problem a few times, and never succeeded.
But today I got the same issue again.
I have saved all data in the window to a log.txt, so if one need this file I can give it.
Again trying to reproduce, but all is cleaned so it's not the same situation anymore.
ps. Just thinking here; could it be a locale issue? In Holland/The Netherlands we use points for thousand groups and a comma for decimals.