It seems like you have chosen BC-A as the baseline. Please try to follow these:
Remove all the baseline images on TestOps
Running each test suite individually. E.g.: Run TS A individually the first time to let KS save its checkpoint image to become its baseline image. After that, run TS A for a second time to compare. Continuously do the same with TS B & C (Each with two runs). Notes: Name the Checkpoint by each TS correctly for correct comparison