hi debby! just want to encourage you on the ss - not to harp on it, but when we look at numbers, it makes all the difference in the world to be able to see many days at once. that lets us see trends, which are important for being able to give advice on the dose.
for example - when a dose is increased, sometimes we see a few days of
New Dose Wonkiness. the numbers might increase for a bit - which seems crazy, but it happens and it can take a few days to settle down.
also, if a cat hits a number lower than they are used to, it can cause their liver to react and put out hormones and sugars that increase the cat's BG. we call that a bounce. so when you've got an isolated 189 in the middle of 400+ numbers, that could suggest that Bart got to a lower range than he's used to and is now bouncing. if that's the case, he'll settle down within 3 days or so.
if you look at a few cat's spreadsheets you'll see that many cats go lower in the evening cycle than during the day. it's logical to think that the evening is a duplicate of the day numbers, but that's not necessarily the case.
it seems like 3 days of data would be enough to know, but without it being in context of the numbers before those 3 days, there's not really any way to know what's going on. it also might make a difference in how big your increase was - did you increase by .25 or .5 or ? that's why the spreadsheet is so important. hang in there - try following squeem's advice and see how you do. if you can't get it, post in the tech forum. there are people who will even get one together for you and transfer it to you - because they really are essential to be able to follow the protocol and monitor the blood sugar numbers.
good luck! keep asking and we'll keep trying to give you a hand!