I am also using the CSV import for pricing and it seems to work fine my end, it sounds like you need to update... Here is a URL to make it a bit easier for you https://plusspec.com/release-notes/
if you guys have any suggestions on how you would like to see imports improved please let us know. I am using a Beta version where you can update all of your lumber prices in one go, it works by cubic measures and it is a big time saver. I have a few other ideas that I think will save you a heap of time but now PlusSpe cis getting so big it is not just about me, what do you guys want in this area?