So, if I correctly understood last news - after update of coin i need to update miner and wallet (And mine on updated pool), all coins that already in my wallet i can use after update on new wallet?
In most cases, yes. An exception would be if you mined new coins on the wrong chain (the one the update forked from), then you'd lose any NEW coins from that chain.
Also, shameless promo; we could use some more hashing power at p2pool
stratum+tcp://p2pool.etyd.org:9171 -u yourwalletaddress -p x
or
stratum+tcp://vtc.royalminingco.com:9171 -u yourwalletaddress -p x
No registrations neccessary, all payouts go directly to the address you use as your username.
Not sure why or what to do.