As I understand the issue you are getting duplicate values in PI Tags from PI DA interface. Can you describe how the interfaces are set up and the version of OPC DA interface.
1. Does the interface has a failover configured?
2. Does the interface use buffering?
3. Does the tags have exception and compression deviation set?
Usually if the interface is configured for buffering, the PI Buffer Sub system should take care of the duplicate values.
Also in the second screen shot, did someone edit the values manually or values are written by interface?
Which interface is writing to these PI Points?