OT News grid limited to 20 news ?

Hello,
I have just discovered OT News Grid, and it is exactly what I was looking for. Thanks a lot for developping it and giving it free.
But There is just one detail which annoys me : the grod seems to be limited to 20 news max. Though I put 50 in the field "count" of the parameters, there seems to be no way to get more than 20 news.
And I really NEED to have more than that...
Is there something I missed ? Is it normal ? Can I change that somewhere ?
Thanks a lot for your work and for your help.

I have checked on demo, seem it's working ok, please check:
demo.omegatheme.com/joomla3/ot_porttitor/
I have setup "Count" field is 50

Hello,
Thank you very much for your answer and the tests you made.
Yes, you're right, it works for me, too. I don't know what happened yesterday, but today, it is OK.
Thanks a lot for your help, and sorry for the "fake alert"...
regards,
Alain