Hi!
It’s possible that there is an issue with the development, but its also possible that something else has gone on.
- What light table are you using? See this thread on Suggested backlight sources for scanning film with DSLR
- Also, try masking out the sprocket holes (from directly beneath the film) as this can sometimes throw off color.
- If you have some where the color turns out really well, try using the “sync scene” feature to bring that conversion over to the other images you are having trouble with. If that works, it may have just had trouble with that particular scene.
- Also, while it is somewhat unusual to start off with a red tint, there is certainly plenty of edit-ability in Negative Lab Pro to take care of it. In your case, try the “Autocolor - Cooling” as a starting place for correcting the tint.
Hope that helps!
-Nate