I have a 2 year old daughter with shared custody (even 50/50 split).
I pay the net amount from the tables also.
So far, I've been buying the clothes for when I have custody, and my ex supplies the clothes for when she has custody. With 50/50 access, and with a child being so young, I think it's easier to just each purchase clothes. When she's older, and may start getting a suit case, and we'll have to split the purchases.
As for jackets, boots, etc. I purchased 2 winter jackets, and they rotate around. And, we both purchased the same amount of boots. With daycare, my parents and both our houses, the jackets do the round, and I find that you need 2 winter suits. One of the suit was 5$ at a garage sale, so not worth the hassle to make a fuss about it.
There doesn't seem to be a consensus if the clothing expenses in a shared custody arrangement should be split as per custody time, or per income (like extraordinary expenses). My prorated income is 70%, and custody is 50%, so I figured the extra 20% isn't worth making a fuss about.