Entry Fields change back before I can change to a new value
When changing the values, they keep changing back before I can click Send. I need to try 2-3 times in order to have a successful attempt.
One of the drawbacks of any HTML web screen is that it has to update frequently to give the user a real time experience. During that process, it may interfere with entries such as you describe. The default is 5 seconds which is an small window. If you change it to 10 or 15 seconds the experience will be better.
See at the lower left bottom of the page. 
There is also the option to turn it off all together with the check box but then you would need to use the mouse right click and select reload to update the screen or some other manual way to refresh the screen.