Be aware! You cannot rely on NB to even calculate SUM properly!

Be aware! You cannot rely on NB to even calculate SUM properly!

I was manualy copying data from table on paper to table in NB. 
In the end SUM was way of, they didn't align. So, I had to calculate and recalculate again as I was sure that my manual calculation on paper was off. But I would always arrive to the same number.
So, I deleted all # data in NB table and it still showed me 60 as SUM!!!!!!!! Whaaaaat??????
As I added new raws (I tried to somehow reset table) SUM came down to 30 where is now stuck.
I will add video in few moments as I recorded it with my phone.

I do not expect any real help from Nimbus as they have proven that in my opinion they do not realy care about bugs and stability.

This post is for users. DO NOT RELY ON NIMBUS TO CALCULATE EVEN THIS SIMPLEST CALCULATION! Especialy if you use it for bussines! 
‚ÄčWhatever I did when adding and deleting raws and columns caused this and it can happen to anyone. This is first time I have a reason to doubth NB calculation and it may never happen again, but from now on how I can trust them forward?? 

Good job Nimbus! Proven to be untrustworthy. Loosing tags, pictures, notes, and not knowing to add 2+2.