The piece on the front-right never stuck to the bed at all - partway through the first layer it ripped off. For the piece on the front-left the head is slightly too low on the left side (mashed filament) and slightly too high on the right side (loose filament). When I print four 2"x2" pieces, the two in the back of the bed have a first layer where the head is slightly too high (there are a few spots where perhaps 3/8" of filament doesn't stick to the bed).
When I print a 2"x2" piece in the center of the bed, it works fine (z offset -5.4). If everything checks out and you still experience the same issues, ping me here and we'll try to schedule a Skype chat ASAP to address the problem. While you have the bed off, inspect that the acorn nuts and the screws used to fasten them are firmly pressed to the aluminum bed platform on both sides. You can mitigate this by gluing the magnets firmly into place, and resetting the Z-offset through the Z-offset wizard. Some of the magnets on C2 beds didn't get enough glue, so they move ever so slightly any time you take the bed off, which could result in a "dynamic" Z-offset. Take the bed off and press on all of the magnets to see if they "click" into place.Check that the flange bearings on the 8mm rods (the ones that run front to back, which move the X-axis) have not popped out of the inner chassis the flanges should sit flush with the inner wall of the chassis.Check to make sure the 6mm rods are firmly clipped into the black bushing housings, particularly the front one on the Y-axis.
In the meantime, you can perform a few quick checks: Customer support advised me of your support ticket, and I recommended we schedule a Skype chat so that I can take a look at some key components on your printer to rule out mechanical issues. I work at ROBO HQ, and do some of the testing and print profile configurations on the C2.
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