Value & XValue getting messed up

[User (Legacy)]

I add my points to Value and XValue (scatter) without a problem and all

displays right. After all those points are added I set points for the last

series which is a line and now my previous points read as 1.0E+108. This

mainly starts at Value[0, 2] and XValue[0, 2]. The actual values are xxx.xx.

Nothing real big or small.

Can something can corrupt along the way?

chart.XValue[lastseries, 0] = x;

chart.Value[lastseries, 0] = y;

chart.XValue[lastseries, 1] = x + k;    // problem happens here

chart.Value[lastseries, 1] = y + k;