This is only an opinion. This Company offers you a job, make sure they're not using your resume to get the contract award. They offered a job, means they trusted that you can perform the job, but then pulled me out from that offered position to a lower position and lower pay after I signed the offer letter ~ a bad business practice. The President of this company must be aware of this.
Disclaimer: This is only my review and my opinion based on my experience that the delivery of job offer by this Company as poor business practice, and to caution others that your resume may be used only so that contract is awarded over to them.