Hi Robin,
The exact entry has been: 90°58’16” W
I sort of remember having seen a “minus” in front of the 90 after saving. It showed correctly at first. But after having done more savings, reprocessings and this and that (no way I could recall what exactly I have done except never having touched the GPS data again) that “minus”disappeared and my Louisiana image got beamed over to East of Bhutan.