That can't be related, rest assured that this is all random, it's a mind game, you reboot your stick and then you see 1m diff share and think oh, it must be it, you do that again, it may happen, then the idea will stick, but the reality is; it's all just random.
I would let the pool set the difficulty to maintain a reasonable load on the network, I don't know how CK handles his pool, but it's possible that the set difficulty would be ignored (assuming it's allowed anyway) if it turns out to be too low and your stick is spamming the pool with dozen shares, so when you first connect, you may see a lot of accepted shares at low difficulty, then fewer larger once, but at the end of the day, if your hashrate is reporting reasonably on the poo -- everything else should not matter.
I hope you hit a block with that stick.
Thanks Mikeywith
Its strangely noticable when it occurs though, I check on my rigs a couple of times a day just to be sure nothing has fallen over initialy when I set-up there were USB problems but I solved that and its been stable pretty much ever since. With the exception of this low share value oddity that has occured a couple of times.
Having said that yesterday was a run on big numbers and it hit the best share value its ever posted since I started running this rig in April with 49.04B .
I guess that's random for you.
Good luck to you too.