Review of Ultrafine VC ELITE Glossy Variable Contrast RC Paper

I have recently created a darkroom in our laundry room for the purpose of making prints and possibly developing B&W film. The first photo paper I bought was Ultrafine VC ELITE Glossy Variable Contrast RC Paper from UltrafineOnline.com.

I purchase 8x10 sheets. I have developed images from film negatives, inkjet and laser negatives, and paper negatives. 

Pro:

1) Smooth surface - feels good to touch
2) Inexpensive
3) Dries quickly, takes squeegee well
4) Works well with Dektol and Caffenol developers
5) Thin enough to be used as paper negative
6) Robust

I don't have any cons - but keep in mind I am just beginning to learn how to print images. However - I love this paper.
 

Brownish Staining on Cyanotypes

I have been making a few cyanotypes recently. I have successfully made cyanotypes before. But now, I seem to be consistently getting brown staining for some reason. The staining is on the entire image - light and dark areas inclusive. I am using paper negatives whereas I was using film negatives before. Some of the paper negatives have been oiled. My setup is as follows: I have a glass base. I lay the sensitized paper on top of the glass. I lay my negative on top of the sensitized sheet. Finally I cover with another piece of glass and develop in my UV exposure unit. I have tried different papers with similar results. The interesting thing is that where the paper negative has not covered the sensitized paper, the paper develops into the rich Prussian blue I would expect for the entire image. Does this process not like my paper negatives? I will try a film negative and report the results. Has anyone had similar results?