I've been using mint since about March 2014, and have made a few major adjustments as I learn how to better use it to get a more accurate view, and it provides a noticeable change in my net worth which I expect. For example I originally added my house with a set value I thought it was worth at the time. Several months later I decided to link it to zillow to pull the zestimate automatically. I have added some accounts here and there, and deleted others, and I think I have a pretty accurate overview of my entire net worth at this point. Some of these changes made drastic changes in my net worth, like the house example where my net worth suddenly jumped tens of thousands of dollars over night. I decided I wasn't getting an accurate historical view because of some of these major changes, so I exported the data and manually corrected some of these changes so I could get the real picture of changing net worth, and was planning on updating it every month.
I have my own spread sheet that I am putting in Assets, Debts, and then calculating a total net worth based on those values and graphing it. I have been trying to put the new data in every month, but the new data I am downloading from mint isn't matching previous data I download from mint. It's not off terribly far, but I don't understand how it doesn't match exactly to the penny. I mean once October 2015 is over, those values should be unchanging right? The value of my assets and debts should not change after the fact. Yet each time I download a new set of trends (Nov 2015, Dec 2015, and Jan 2016) the data for October 2015 is slightly different. I never noticed this before tracking it in my own spread sheet, but now that I am it's not making any sense to me.
Has anyone else noticed this? Does anyone have an explanation why my historic values are changing?
EDIT: Just to clarify it's not just Oct 2015 changing, I was only stating that as an example. Almost none of the monthly values are the same, but i'm not paying too much attention to the older data because like I explained I don't think that data was very accurate to start with. But I am noticing it for all of the recent months despite not making any major changes to my accounts.