DS-settings "Pause after send" and "Hourly quota"

I set up both of them (e.g. 200 "hourly quota" and "pause after send" to 16000000) nevertheless MW sends out all 200 emails in one go at the beginning of an new hour (e.g. 2 pm, 3 pm, 4pm... and so on) and does not stick to the pause between two emails.

Is this the approach as it should be or did I something wrong? And how can I set it up that MW doesn't exceed the hourly limit and still keeps the pause between 2 emails?