Should I be concerned?

[Mike Cavanaugh]

what if she drops another litter before the first ones weaned off?

Just let the other moms take care of the kids. You may loose one or two, but that is ok... they will be recycled.

I have 2 other females in the tank who delivered about a week ago, can I feed her off and let them care for her babies?

Who did you get yours from? mine came from a gentleman in Okeechobee

Yes.

A local shop that probably got them from the same guy. They look just like the ones I got too.

ASF's are all prone to tumors and warty growths, some more so than others.

I have to respectfully disagree. I have literally produced THOUSANDS of ASF's directly related to that original group. Great grand kids from that group have already been retired from breeding.... and I have NEVER had another tumor growth. I have absolutely no scientific data to back it up but common sense would tell me it has to do with poor feed. (not suggesting poor feed is being used by the OP... suggesting it was used by the breeder)