Load error sequences in song mode

I am new to the world of mpc usage so bare with me. I have an mpc renaissance and i have been making beats. I save a beat as a sequence using the save sequence option. I then load the sequence into song mode. When i atempt to load the second sequence it says load error if you load this sequence it will replace all other sequences. This prevents me from writing a whole song. What am i doing wrong?! Please help!!

Ps. I also cant drag and drop a sequence onto a pad or into my work flow in any way. It just keeps erasing the first sequence.