confused with tabs, indents

I'm having trouble with indents and tabs. Been using word for a long while
now, various versions, never had it do this before. Not sure what brought on
the change.

when using bullets, I'm trying to indent to various levels. I used to hit
the tab key or shift+tab to move the indent. Doesn't work anymore. The tab
key pops the cursor to the middle (3.4 on ruler) of the page. Not sure what
happened.

Anyone know how I can get his going back to the 0.5 incremental indentation
that was activated by the tab and shift+tab?

Thanks,
Robert