Today I got a couple new shelves. I'm not going to finish getting the first one put together tonight because the instructions are quite bad.
Step 21: Realize before attempting this step that there's a missing step between 20 and 21. It's effectively the same as step 13. Step 22 and later should be delayed until the shelf is moved into position with the exception of steps 32 (which is where I've stopped for tonight) and probably 33 which should be done before then.
Step 4 indicates that 2 more of part 1 should be used than is true. Two of the holes are there to later receive part 3. Step 10 should be completely disassemble the unit because step 1 didn't show proper orientation. Step 13: Discover that there are 3 completely different things labeled part 9. Step 19 has clarifying text that might have been useful to have in step 10 (as written, not the take it apart and try again one).