Crime sweeps are found in expansion systems, not control systems. Any cycle we are in turmoil prevents preparation, which in turn precludes expansions the following cycle. We don't have any this cycle either, but in the future if you go into the GalMap, select Powerplay View, and tick the Expansion filter, you'll see any expansions we have marked by bullseye markers. Those systems will have crime sweeps.
Fortification to 100% in a system removes it's upkeep for that cycle. I'm not sure what you're expecting to happen. If the fortification trigger is reached, further fortification will have no effect.
As far as the messages the OP mentioned, that would suggest you're trying to prepare a system (I'm not sure - I haven't seen that message) with corruption reports. We cannot prepare a system while in turmoil, so collecting/buying the reports in the first place is pointless.