I practice my list of textbook words and know the writing and tones of them. I did not practice the reading before and would like to practice it now (for my test tomorrow), but it seems I cant practice it since I already know the writing. It only gives me the last 4 characters's pinyin of which I didn't know the writing yet.

Do I need to bomb all my words if I want to practice the pinyin?

No; just set yourself back to the beginning of the textbook and it will go through and readd the words, including the pinyin parts, when it comes time to add new ones. (So you could press the manual add button to force it.)

The way to change this is in the "More Actions" dropdown on the list page: "Study Settings".

Ah, thanks. Already bombed it. hahaha

I tend to have adrenalin filled suicidal actions before a big tests. :D