Cay...That looks about right to me, assuming the lower, numbered shots are with 70 and the higher ones are at 100...
My .54 would look about the same, if I'm looking at it correctly...One other thing to remember about patches, if you change lube it might affect not only group size, but elevation as well....I've always thought that one lube or the other was either better at sealing gases, giving a little higher velocities or was "slicker" and would shoot lower...

About the wind...I've shot .40s, .45s and my .54 in different matches around here in NC....It is dang near impossible to dope the wind with a round ball, best thing I have found to do with my slow twist guns with cut rifling is to really stoke them up, watch the flags down range and if they drop, touch her off....