First, along with everyone else, thanks for this sheet, an awesome and no doubt massive piece of work.
As an intermediate standard DM, running his first campaign in the 5th ed rules for a bunch of brand new players, this has already proven invaluable for helping them create their characters, and give them the chance to play around with stuff before settling on their choices.
But as with every spreadsheet there are always going to be bugs, and we have stumbled across one.
I couldn't find this mentioned anywhere else, and skimmed back to the comments that seem to cover version 1.60 and found no mention. This is the version generating the bug.
In the attached screenie you can see the excerpt from the spellcasting page of a level 1 Cleric. Under the level 2 - level 5 spell lists it says "Select your spells - 2 remaining", but as a level 1 cleric these aren't available yet. I beleieve this is related to the domain spells. The spells aren't listed in the spell area (See drop down on the screenie) so it's only the count at the bottom that appears to be affected. It also occurs at levels other than 1, and of course once you hit level 9 it's no longer an issue.
A similar effect occurs using the druid class, once you pick the origin at level 3.
Hope this helps!