Bitcoin is open source so anybody can play with its code and can create their own software, same goes for developers behind this Bugcoin (BTU). Actually there are many other alternative bitcoin clients developed by different developers but they need to be accepted by both node operators and bitcoin miners to reach consensus.

Recently this BTU (unlimited) have been in buzz because many miners have started to support them but it looks like their client is still not ready for adoption proved by all this repeating bugs.