EasyChart stops displaying data periodically - new entries randomly added into sqlth_scinfo

Randomly, all EasyCharts stop displaying any tag history data on a particular site. They’re running 7.9.12.
When this happens, it coincides with new entries being added into the sqlth_scinfo table. When this project was first installed, there were only 3 entries, ids 1,3, & 4. Now there are ids up to 19?
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When I manually edit the random new ones’ drv id from 2 to 4, then data shows once again in the EasyChart, however new entries will be added randomly in x days (not sure if it’s days/weeks/months):
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The sqlth_drv table contains:
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I’m not sure why this contains duplicates as well, but at least they don’t multiply over time.