Chris,
Tom and I are having the issue. There is nothing custom about the spreadsheets and yes I am using it locally.
To get it reproduce the problem:
- open a blank workspace (spreadsheet)
- click on View
- click on page layout
- add data anywhere
- click FILE-PRINT
- change the margins to something else
- set "No scaling" to "Fit all columns on page"
- go back to the spread sheet and add a full page of data so the screen scrolls.
- add header/footer information
- copy entire lines and "insert" them.
- add header/footer information
At this point, if you click on the edge of a cell instead of the center, it will select a cell at the very top. Then if you select a cell somewhere else, the cell highlighted will be offset.
WORK AROUND:
Add another sheet to the workspace and then randomly click in the cells a few times. When you go back to the original workspace, it seems to correct itself.
So consequently, when I'm working on a large spreadsheet, I have to add another blank sheet to occasionally switch to in order to remedy the issue.
This is a very annoying problem and it only happens on office 365 version of excel.
I hope this helps to narrow down the issue