Dear Robert,
Thank you for your feedback on the user defined graph. In general, it is a difficult problem to optimize graphs for which we have no a priori expectations - i.e. it's entirely under user control... Also, as you pointed out, few data points (such as the results of a single test) are not representative of the types of graphing that are most useful, i.e., typically graphs are useful when analyzing trends over time and in such cases overlaps tend to be diminished.
Having said that, we have forwarded your comments to our development team and they're evaluating some of the algorithms being used for the upcoming HealthFrame 2.1.6 release. We'll be looking into ways that we can rely less on 'centering' and more on the context of the data that is entered in the personal health record, trying to control the Y-axis value ranges so as to minimize overlaps.
Thanks for your feedback and please let us know of further improvements we can make to HealthFrame.
Support Team
Records For Living