Using your best glossy photo grade
paper and highest quality print mode with a mechanically sound and calibrated (neutral grays) machine, correct? Are you setting your spectro correctly in the case of any OBAs? Personally, I would evaluate new software using my best possible setup first, then my typical production setups.
A red color ramp should simply start at white and graduate from pinks trough clean red tones ending in black at the end. It might help to better describe your color issues using known colors such as Pantone IDs. Notice, if referring to red Pantone colors, it is normal for many dark reds to print brown. Also, using LAB, RGB, and CMYK values, you should be able to learn what’s happening in the RIP translation of color from input to output to see if your expectations are reasonable.
So, does a simple red color ramp appear correct to you?