I think Pollus's error is actually really easy to make. It's not the new system's fault, I like the TT+ for CLDs, it makes it easier and prevents lots of errors.
I don't have any CLDs, so I can't do a test, but.... when you put a stack of CLDs in the offer window, and set the price, does it say TT+X for the mu? And does it adjust for the amount of CLDs? For example: if you put 1 cld in the window, and you do 1400, it should say TT+1400 for the mu, but if you have a two CLD stack, and you put it in the window, and do 2800, does it say TT+2800 or TT+1400?
If it says TT+2800 for a two-CLD stack, then yeah Pollus's mistake is really really easy to make. It's counter-intuitive to the items that have %mu and how we handle them in auction.
7 CLDs for TT+1400, your instincts wouldn't be to do TT+9800, you would want to match it with TT+1400 or TT+1399, just like you'd match the %mu orders.