maybe frame blending is turned on? a check mark by the appropriate Frame Blending command and Enable Frame Blending button at the top of the Timeline panel. if both are off, then perhaps you just don’t notice the slight stutter from the frame mismatch. either way, maybe you used a lot of shutter blur on your project and it blends well or maybe it will be more noticable on the big screen.
The only way to be sure your dcp is good, is play it on the actual machine. it has lots of safeguards and is very very particular how you format your jpeg2000 files.