Hi,
I don't think they are affecting the output directly, the sunpy example alos produces these warnings.
But in your case, it looks like the images are not aligned correctly.
If it's your own LASCO file, I assume it has been processed to a higher level before hand?
I am not familiar with the LASCO data files but if you can try to query it for the same time as the file you have locally and see what happens.