In reviewing a chart I am seeing the same thing on my end. This data for the continuous contract is provided directly by IQFeed, and we can not modify that data as it is provided. All we can do is edit the data.
If you go to Tools-->Historical Data Manager-->Edit for the CL continuous contract you can modify the data for bars near roll-over date so that it will display more closely to the CL 10-10 contract.
You can decide whether to back-adjust the data from IQFeed, and then manually adjust the results. It would be possible to manually adjust whether the data is back-adjusted or not. Either way the process to edit the data is from the Historical Data Manager.
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