Numbers overlap columns
When I open a numbers sheet that I have moved from Office Excel years ago and I work on once per year since the system seems to have overlaped columns. When I expand, for instance, "column A", I find several columns in one column. This seems to be a glitch. I cannot change or erase these columns. OS Yosemite 10.10.2 IMac 27 inch desktop with Numbers 3.5.2.
iMac, OS X Yosemite (10.10.2), Numbers 3.5.2