Danny,
I do believe that the riser blocks are available only on the larger bandsaws as the smaller bandsaws would be under powered to resaw anything over whatever the height capacity is of the saw.
As to the blade running on the front of one tire and the rear of the other, it sounds like the tire wheels are not aligned with on another (not coplaner). If you can get the blade to run consistent and track correctly the way it is, ( without the blade sliding off the wheel) you can shim one of the wheels to line them up.
I have a Grizzly G0555. The manual that came with it explains how to do it and check it. You may wish to download the manual for one of the Grizzly saws, as after the instructions for saw assembly and setup, it has a lot of good tips and troubleshooting for bandsaws in general.