Googledoc spreadsheet odd behaviour

[All that jazz]

I have a column on a googledoc spreadsheet where the data in some of the cells is inside apostrophes, eg. '894' . When leaving the cell, google is removing the first apostrophe but if I click back up to the editing bar above the sheet it re-appears until I leave the cell again. Any ideas why this is happening and how to stop it as it's messing up my formatting. Thanks.

[All that jazz]

OK! Thanks for your help!