CD keys getting banned for no apparent reason

I have been banned about 6 times since DayZ release for hacks but stopped doing it up until about a week ago. I then went ahead and purchased an injector along with a 1 day trail of some awesome hacks, got me banned by admins off a few servers but no global bans. Then 4 days ago that key gets banned, wasn't very surprised and assumed that one of the admins had reported me on the Dayz Forums.

Then I purchased a new key, after deleting all my hacks and injectors from my PC, played on a private hive completely legit for 2 days, then yesterday the key was banned while I was logged off and asleep. I assumed that either the key was also in use by someone else or something else unknown to me was happening. I questioned the key seller the next day who was kind enough to give me another key immediately despite not offering any warranty previously. I checked the key via Darkys Key Changer. It was not in use or globally banned. Changed my key to it, went into Dayz, joined a server, and was instantly globally banned.

I have no idea what to think at the moment and was wondering if anyone has any suggestions. If I spend the extra dosh on a legit CD key will it get globally banned the first time it is used or will it stay clean until I forsake it with hacking. Is the CD key seller to blame for whats happening? By any chance am I IP banned from Battle Eye and therefore is it worth switching my router from a static IP to a dynamic IP?

Thanks in advance

you are buying cheap keys correct? these are all stolen and more then likely resold again and again

also dont launch the game from steam. it'll revert back to your orig key

well the keys can be flagged and just waiting for someone to log on before it gives the ban. this has happened to me before

stop buying cheap keys. it just supports the key stealing thieves! get a good bypass and a good key