yeah i think i've seen that with my team...i feel like the cap messages aren't that systematic, i.e. when a player reaches his cap, you're not necessarily going to get an email right away. you will eventually, but maybe not right away. thus the different players that you got the messages from just happened to have messages sent first this time.
however, we should be able to tell in a few days if this is the case, or in fact the caps were not reset.