It is consistent. The fact that someone couldn't get her for 6 days and then got her 2 times in the same day doesn't prove anything. It's random after all.
I had the similar situation. Nothing for the first few days, then 2x IN A ROW from 2 silver boxes. And also third one on the same day. But still, rng is rng.
I have no idea where did u get that from. Looks like some random hocus pocus based on your opinion. If you have a source however, please do share.