I know this may sound silly but please make sure the table/surface you are putting the cake on when leveling it is also level. The one and only “wonky” cake I had was due to putting it on an un-level surface. I was able to put some Styrofoam wedges under cake to level it (instead of disassembling it and re-doing it) but it was not a perfect solution. I agree with the two above answers though… the more supports the better.
