Equipment can help meet the stat requirements of each other?

Sorry if this is extremely old news or something, having only had a lukless magician and an archer prior, I haven't had a character where all equipment requires a secondary stat, so this is news to me, I just want to confirm. On my striker, I had a 4 dex level 90 hat, 10 dex level 90 overall, 0 dex level 90 shoe, and a level 100 king cent. Without MW, I couldn't put any of that stuff on (I sold the zakum helmet I was wearing), but with MW, I could put it all on. But once MW expired, all of the equipment stayed on me, and my dex was still a total 100, which means without the hat and overall bonuses, I couldn't wear any of the 3 equipment or the knuckle. I tried taking off the hat, and once I did, I was stripped again and couldn't put the hat back on. So how exactly does this secondary stat thing work when all your equipment requires it and adds to it as well?