What base target (the little red and white target icon) do you see? I see tens of thousand of percent.
Also, the block explorer shows the base target increasing dramatically:
http://87.230.14.1/nxt/nxt.cgi?action=105473 14195150371142589470 566713 0 0 605925763130 0 0 6965796235585550964
5472 9575565819347146297 566443 0 0 302962881565 0 0 2616818314257352073
5471 17693815705716663328 566339 0 0 174786277826 0 0 2616818314257352073
5470 12338540848651413889 566283 0 0 187271011957 0 0 6965796235585550964
5469 8499461349111284557 566227 0 0 200647512812 0 0 7678554491804589202
5468 15983375086446388884 566080 0 0 100323756406 0 0 2556221026631726577
5467 15925998402635253895 565919 0 0 50161878203 0 0 2556221026631726577
5466 373389247039999903 565863 0 0 53744869504 0 0 2556221026631726577
5465 11993978457853181973 565590 0 0 26872434752 0 0 6785084810899231190
5464 11317452651914963516 565437 0 0 13436217376 0 0 6785084810899231190
Moreover, you have accounts with relatively low balances mining several blocks in a row.
Umm... what is going on here? Is the block explorer broken OR is the network broken?!?