Photos on the internet of Imagica tiles show the same lines.

I'd call DAL tech support first. If this was my installation, I'd send it back.

I've used that tile and it had no screen lines.

I don't know if your tile is made properly or not but we have a linen type texture on our shower wall tiles that in retrospect I would not choose again. It's not horrible and will be fine if that's what works with your design but I can't wipe down easily with a microfiber towel b/c it "sticks" to the texture vs. a smooth wipe down. Squeegee is fine and the tiles are not soap scummy after 6 months from install.

Your tile is fine. I've used it before (in fact JUST used it for someone's bathroom floor). Even with the grooves, because of the fact that it's porcelain, junk won't stick to it as readily as most tiles. You should be fine.

Which grout did you end up using? We have the same exact tile and can't decide on grout color!