what you're seeing is the fee.
every transaction have 0.25%(if i remember correctly) fee and sometimes(dont know why..) the book order shows a different order to cover the fee.
the bot buy 10k satoshis of this coin, it will show up two orders, one of 10k and one of a few satoshis(0.25% worth)
fee is not a problem my friend,im just asking which software they using to buy less amount of coin like ex(1creva coin =0.00000009)
we cant buy 1 creva coin but bot buying just wan to know what is the bot they using to buy less amount of coin at a time