why does blake2 and libb2 have different API in e.g. the "simple" apis?

[lulcat]

blake2:

 /* Simple API */
  int blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
  int blake2b( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

  int blake2sp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
  int blake2bp( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

  int blake2xs( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );
  int blake2xb( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

  /* This is simply an alias for blake2b */
  int blake2( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen );

libb2:

// Simple API
  BLAKE2_API int blake2s( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen );
  BLAKE2_API int blake2b( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen );

  BLAKE2_API int blake2sp( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen );
  BLAKE2_API int blake2bp( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen );

  static inline int blake2( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen )
  {
    return blake2b( out, in, key, outlen, inlen, keylen );
  }

I mean.... using system headers then is a total hit and miss? And seriously no one cares about this all this time? I been using the source in projects so ok, didn't notice, and I been building systemlibs with blake2 but now I am on guest system, and header is from libb2 and it blows up. Surely, someone, somewhere had to look at this and think... Oh dear...? arrays, then lengths sure, but "fat" array tuples looks both nicer and I think associatively makes more sense. Kinda gonna be wild now to unite it.. Blakes are not going away so better nip this whilst you can guys imo.

Cheers.