ALDI Assistant Store interview questions

Was brought in for a group interview and "speed chat" with one of the three store managers present on the day. We arrived at 10 and left by 11:30. There were a total of approx 26 people in for assessment. The area manager and store managers gave an intro about them selves and we were all asked to introduce ourselves in turn. We were given a group task to complete ( explanation+ 5 Min individual review+ 15 Min group discussion + 5 min to present to groups) and as the group taks was going on at the same time we spoke individually to the store manager for 2/3 min Day concluded with area manager giving the solution to group taks and explaining more about job role / Pay / hols / probation etc. 24hr later got email rejecting me . Having spent years hiring for sales roles I cannot phantom how any skills or capabilities were actually observed in this context as only area manager observed the group exercises spreading herself access the 3 groups.