I have disputed about three or four different items on two credit reports. I have several other items to dispute on same reports. When they are through investigating the first set i disputed how long after that can i dispute the remaining??? A couple of other boards stated 90 days after i receive the outcome on the first disputed items. This seems like a long time to wait if there are 8-12 items to dispute and can only dispute 3-4 at a time???
Fire off the next round as soon as you get your results. You don't have to wait. I actually had 2 or 3 disputes going with the same cra a couple of times and it never hurt me.
Conventional wisdom says to wait and take it easy. The reason being you don't want the CRA to flag you as "repairing your credit". In reality, it doesn't matter - they are legally obligated to dispute at your request unless it can be deemed frivolous. I've routinely had 3-5 disputes all going at the same time.