Are chemistry labs and tutorials supposed to overlap? Because they're doing that for both classes in both semesters, and it doesn't register as a conflict.

I've never really heard of that before; then again, I'm not in Science. Don't take my word that it's normal, but if they're every-other-week labs, and they run on opposite weeks, then they really aren't conflicting. Someone else will have to tell you for sure though.

/My useless post.

Yes. They overlap. The Labs and Tuts. are listed as occurring EOW. So, in week 1 you'll have a Chem Lab, week 2 Chem Tut, week 3 back to Chem Lab & so on so forth.

The poster above is correct.
The life sci chem tutorial and labs are supposed to overlap. The labs and tutorials alternate every week. So on one week you have a lab and on the following week you'll be scheduled to have a tutorial at the same time. However, for chem, you don't need to attend your scheduled tutorial section. But it is mandatory for you to attend your scheduled lab section.