Definitely plausible. A higher 'most recent salary' means more money in the new job. A counteroffer doesn't change whatever conditions about a job made you lea

Definitely plausible. A higher 'most recent salary' means more money in the new job. A counteroffer doesn't change whatever conditions about a job made you leave, be it unfulfilling work, coworkers, a bad environment, long commute, etc. - unless your only concern about the job was being underpaid, which is likely far rarer.