Hi Sir Alexander,
I noticed that if the page has already a chart/s and if I add new chart the Chart ID got rearranged autmatically.
Example: I already have 4 charts (Chart ID: Pages_Default0_aspx_0, Chart ID: Pages_Default0_aspx_1, Chart ID: Pages_Default0_aspx_2, Chart ID: Pages_Default0_aspx_3) in a page and I added new chart above the already available Chart ID got rearranged by itself.
So the newly added chart got the Chart ID: Pages_Default0_aspx_0 and used the already configured chart configuration with Chart ID: Pages_Default0_aspx_0 and the previous Chart ID: Pages_Default0_aspx_0 got the configuration of Chart ID: Pages_Default0_aspx_1 and so on.
Due to this issue I have to reconfigure the whole charts.