imo if you with your experience is already questioning these issues after 1.5 weeks it stands to show that this company, without a vast overhaul, seems to be the issue instead of you, as an individual.
It doesn't seem like a high-risk career move if you were able to substantiate your claims to recruiters/hiring managers/whoever in the event that they were to discover this inconsistency in your resume.
It doesn't seem like a high-risk career move if you were able to substantiate your claims to recruiters/hiring managers/whoever in the event that they were to discover this inconsistency in your resume.