I just tried to import a 6 image gigapan and the program failed to open the images I selected.
The first screenshot shows me selecting IMG_3196_7_8.tif, IMG_3199_200_201.tif, IMG_3202_3_4.tif, IMG_3214_5_6.tif, IMG_3217_8_9.tif, IMG_3220_1_2.tif. The second screenshot shows what happened after I pressed Open: the list of the names of the opened files is right, but it has not opened the right files. You can't tell, but I can see by looking at the images in the gigapan import preview that the first image is not IMG_3196_7_8.tif. The third screenshot confirms that the files that the program has opened are not the ones I told it to open (the first image in the group is IMG_3184_5_6.tif which is not one of the files I selected).
How difficult is it to get this right?