bottom layers of print are extremely ugly, rest of the print is fine. printrbot jr

[3DRC]

whenever i print something, the bottom few layers that are facing the rear of the machine on the y axis, come out with an ugly finish. it looks all coarse and wiry. is there an easy fix? is my bed not level? is there something wrong with the firmware? also, the build platform is 6,6,6. and whenever i try and put something that is even remotely close to what the printer should be able to handle, it says my part is too big. its set at X:150mm Y:150mm Z:150mm but when i try and print something that is 136mm wide, it says its too big and wont fit on the platform.... any ideas? thank you. heres a picture of the "ugly" side and a picture of the "normal" side

P.S. i also get a very ugly top layer on my products..... is there something im doing wrong???