water drainage and maybe mold problem
Only time will tell. You could bring in a consultant for a more informed opinion, but it will be still be just an opinion. If there is no other source of ground water and the run-off was adequately managed, it will eventually dry out. It's possible to drill a small, shallow monitor well to determine if there's a shallow water table problem. If there's any water at all, by monitoring over a period of time, it can be determined if it's accumulation slowly draining off or something more permanent that needs to be addressed.