Abtech Technologies interview questions

Received cold call from recruiter for a much lower paying position, was forwarded to CEO, did a second phone interview. Did a skills questionnaire, then was forwarded to direct manager phone interview. Afterwards, set up an in-person panel interview with CEO, direct manager, and senior engineer. Showed up, immediately wrangled into CEO office and talked money/benefits. Handshake agreement on X amount plus full benefits. Thrown off guard by having to negotiate pay before anything else. Did a personality test in conference room alone. Then did the panel interview in another room. Asked basic questions, then simple two-way Q & A about the work, skills required, and work culture. Couple days later, after a background check, received verbal offer to sign on. Accepted over e-mail. Showed up on site to sign offer letter, was then told only 75% paid on benefits and that the agreed X amount would be adjusted automatically to fit. Bait and switched. Accepted anyways, started a week later.