1. I just got an update from Skritter that said I'm now at 2004 characters learned and 2612 words and 2034 tones. Problem is I have only added 1997 characters and learned 1987 if i look at my progress, added 2600 words and learned 2588, but tones are right with 2034 learned out of 2088 added.
I noticed this at least with the characters the last 1 or 2 times as well...
2. I re-added a list which i had edited (added to the end), but I get the impression that skritter, which had to start again from the start, is checking the list for new items and jumping up a bit, then perhaps counting that as a chance to add a word (so i add words less frequently when it is the turn from another active list). Back in the day i remember it almost hanging as it zoomed all the way up to the first word yet to be added. Now I have practiced couple hundred items and it still hasn't gotten close to catching up (and the list is fairly short).
bonus - the ordering seems a bit weird - i am getting like readiness percentage steadily going down then suddenly 100++ items later it jumps back up to much more ready items (say 300% when it was just going down from 120 to 119). And it's not like they "just got ready" since there are a bunch and were actually always more ready than the first bunch i studied.
those are some vague bug reports but let me know if clarity is needed or perhaps others can add their experiences.