usually what i do it upload in batches, like these set i want uploaded to this post, then i temporary put it in notepad while i upload the rest and junk. that way i can do a certain amount of pics per post. but you can't beat the board tho, if you post too quickly after your first post it automatically merges it weirdly, i've had it happen too that's why you just got a wait a bit until you post your next batch