Hello,
Unfortunately at this time there is no property to allow the graph, and only the graph, ignore DST as you mentioned. The best I can do is make the following three suggestions.
1) You may create a product suggestion at by clicking on the "feedback" link at
www.ni.com/contact so that our developers will consider adding this feature to a future release
2) If you change the time display of the graph to relative time, this jump in time should not be displayed
or
3) If you change the timezone on your computer to the timezone where the data was recorded, this should not be an issue.
Scott Y
NI