Kalmar-Gothenburg looks to be almost a positioning sector to get the aircraft into Gothenburg to maintain the daily Birmingham-Gothenburg service - one of the few routes that seems to be doing OK. Stavanger-Gothenburg was flown on exactly the same basis - route ex Stavanger in the morning (the short-lived excursion to north Norway), then aircraft goes to GOT to fly the GOT-BHX.
I can only assume that both the Kalmar and Karlstad routes are being underwritten by airport / local authorities, to sufficient levels to cover the operation and the daily KLR-GOT leg.
If Flybe put a daily 175 on BHX-GOT, which can't be beyond the realms of possibility given their route development plans, I'd imagine the whole thing will go up in smoke.