The Auto Task ID column is auto-generated by Smartsheets and is supposed to be a UNIQUE identifier. Shockingly, it generated two of the same IDs, this is a SMARTSHEET bug. (Several formulas rely on this ID to be a unique identifier). Perhaps somehow two users saved the sheet simultaneously or something to create this bug, that's my only idea as to how this happened. In any case, this bug needs to be fixed so that formulas do not return erroneous values - for example since the Auto Task ID was not unique it returned the FIRST value with the ID rather than the SECOND value with the same ID (that should have been unique).
Please advise as to how soon this error may be resolved