When choosing a lab and tutorial, do we choose the same one because it is every other week? for example, for Chem 1A03, if i chose lab L31 which runs every other monday from 11:30-2:20, would i choose the tutorial T31 which runs every other monday from 12:30-1:20? or does it just not matter?

First off you don't choose labs/tutorials! You get placed in them by SOLAR and you'll see your timetable in August and be able to change things around if you can and want.

But yes you just choose the lab section and that's the tutorial you will be in. Tutorials are technically not mandatory so you can go to any tutorial you want!