Tabbing is jumping at weird places in the screen

Tabbing is jumping at weird places in the screen

zSheets Team,

I am creating a Zoho Sheet as here:  https://docs.zoho.com/sheet/published.do?rid=inwcs7be3be2db29240cc8da7bcbf97e3bf71

When I type in one cell and press enter, I am expecting the cursor to focus on the next cell immediately below.  But the cursor is going somewhere else on the screen. 

Can you help please?

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Deepak Vasudevan
http://www.linkedin.com/in/lavanyadeepak