That is odd, Andy. The only way it would anchor would be in you placed it before a paragraph return or between characters in text.
So far as the large text wrap, InDesign is picking that up from a previous picture box. Look at your object styles palette. I’m guessing when you place the art, the normal art box in the palette has an x next to it (which means it’s been modified).
You will have clear that by option + clicking the normal picture box to set it back to normal, and then place it. Then it should come in fine, and the rest will as well.
I remember a while back everytime I drew a text box it was coming out double-column. InDesign had remembered it from a previous box somewhere in the job. So I had to option click the normal text box.
That reminds me of the time when every time I was placing text it was coming all coming in as Zapf Dinbat. Seems the last person who had used it use that character style and everytime I imported a file that character style was applied. So I had to click “none” and them import and it was fine after that.
I have no idea about why it’s coming in anchored except those two reasons I gave.
Good luck.
Dwayne