Rendering three Projects into one

Is it right that if I drag three Project files containing proxies to the timeline, I can only render in proxy format?

The Projects were all built in the same folder.

EDIT: Ok, I disabled all the proxies in the Projects and saved them under new names. Used the new versions to render and it worked fine.

Handy to remember this, I didn't know it worked that way. All's well that ends well.

EDIT again: Just shows you how stupid you can be. Just got to Project settings > un-check proxies > Ok > save Project > close it down. Re-open. Job Done!. Dam it, must get myself a new brain!!.