You can't resubmit a batch, because it's either received by Transflo and then transmitted to the carrier, or it's not. If Transflo didn't receive it, then the only way to "resubmit" it is to scan it again, which will give you a new transaction number. If they got it and then transmitted it to the carrier, and you have a transaction number, then there's no reason to resubmit it. (Unless it's too light or illegible and needs to be rescanned and tweaked, but that will be a new submission and you'll get a new transaction number.)
I like it when they tell you the POD was received, but the BOL wasn't received, yet there they both are right there on the Transflo Web site.