There can be only 3 issues that create uneven bevels

Warped Spine
Uneven Grind
Bad Honing


The first two are rather easy to spot, the third however can be rather difficult to find The real truth however can be that the third when corrected can overcome the first two


Pretty Zenfucious huh???


Yes Pics will help, but when you say several razors have uneven bevels, that in itself points toward #3