Description of problem:
When selecting a specific monitoring graph in some time frames the graph is non consistent with the textual values given.

Clearly the "Maximum" shown does not match with what you can see in the graph. If we hover above the maximum points far bigger values are shown than in the textual representation above the graph.

If this time frame is selected NO errors or exceptions are logged in the server logs or in the Web-UI.

Version-Release number of selected component (if applicable):
JBoss ON 3.2.1

How reproducible:
Very often

Steps to Reproduce:
1. Navigate to the JON UI -> Monitoring -> Metrics and check the textual values for Minimum and Maximum as well as the values in the corresponding graph. 
2. If the issue is not visible, change the time period that should be captured in the graph and check the values again.
3.

Actual results:
Text maximum value shows different value then the Maximum value in the graph. For instance, text Maximum value shows 8.6G while it is clear (from the screenshot) that this value is more then 10G.

Expected results:
The correct Min and Max values are written in both graph and outside of the graph.


Additional info: