Column letters covering cells in spreadsheet on iPad

The a,b,c etc cover the cells in my spreadsheet when I am working on it. They are NOT above it. They are OVER it! Literally covering the first row. It’s not on every page. How do I stop this? I realize when I touch a dead space it disappears, but when I go to the cell to make a change, they cover it! I cannot just click on a cell and edit without the letters covering it.

[Re-Titled by Moderator]

Original Title: The column letters cover my data in the spread sheet while I am trying to work it.