1. The C share lost exactly 30 quid, which means that contestant can't get that custom "I was on Divided and all I got was £1650" t-shirt.
2A. Stopping the clock is an inexact measure. I'm sure a devoted viewer like you has seen the team come to a consensus, but the money meter dropped $50 or $100 in the process of the locking in. It happened last week, when a team agreed at literally the last second and put hands on the Triangle of Agreement which would have meant $15 in the C player's coffer, but the money drained to $0 for all.
(Related to the above) 2B. A second went off the clock (notice the on-screen clock is at 49 seconds), which meant 1% of the original values should go down. The C share started at £3375. According to my math, the C player got a savings of £3.75.
3. In the grand scheme of things, if you win $2000 on a game show, are you really going to get your knickers in a bunch over forty bucks?