Which, AFAICT, means one of three things:
1. The influence occurred *before* the "inflation" (FTL universe expansion) which is what TFA suggests.
2. The influence comes from hyperspace -- which I think would fit with the fact that the researchers claim that there is no difference in speed depending on distance from the apparent "target" of these clusters' movement. TFA concludes instead that the influence comes from something very far away and so the difference is vanishingly small.
3. There is some sort of systematic error in the observation, which seems not unreasonable given the (apparently) roundabout way they're measuring velocity (not that I understand the method at all, it just sounds that way from the article), and would also fit with the uniform speed.