Issue with text leading changing without paragraph style being implimented?

Hey all,

I have used Adobe InDesign, Illutrator and Photoshop for 15 years now and I've run into a problem I've never experienced.

I am working a new job where my predecessor did some funky things on some important InDesign documents. I'm working on a page now where I have a block of text, and every time I move it to the middle of the page the leading all of a sudden spaces out? There's literally NOTHING else on the page in this area, I've moved and deleted everything. For some reason though, the leading keeps changing when I move the text onto the page.

Also, on certain parts of the page, the text keeps "Snapping" to guides and grid areas, even though I have all of the "Snap to"'s turned off? I'm completed baffled.

I checked the master (A-Master) page and there's NOTHING set there that would cause this. The text has no paragraph, cell or text style set.

Could anyone please help me trouble shoot this? Sorry for the long rant.