Potentially being squeezed out of business I helped start!?

I went thru something like you're describing. Read the LLC Articles very carefully. Everything is based on what is written in those articles and what everyone signed. If they are breaching that contract you will need to see an attorney. They cannot demand capitol from share holders nor can they give your shares away. Your current position is based on everything previous to this new arrangement and you would have to agree to any changes to reallocate shares. I suggest you get everything in writing and do not agree to anything verbally. Good luck.