Inconsistency in librdkafka RPM Package Naming

[mana0x7c3]

Hi, I'm a little bit confused with the naming of the RPM package.

If I build the RPM with mock using the Makefile, the output is librdkafka1...rpm, but the source package omits the 1 (librdkafka..src.rpm).

librdkafka1-2.2.0-1.el7.x86_64.rpm
librdkafka-2.2.0-1.el7.src.rpm
librdkafka-debuginfo-2.2.0-1.el7.x86_64.rpm
librdkafka-devel-2.2.0-1.el7.x86_64.rpm

In the EPEL repo (in a Centos 7) (also in fedora repo), the package is called "librdkafka" without the 1 (so it's not using the soname variable).

librdkafka-0.11.5-1.el7.x86_64

The README states that the RPM package is librdkafka but librdkafka1 in Debian:

Debian package: librdkafka1 and librdkafka-dev in Debian and Ubuntu
RPM package: librdkafka and librdkafka-devel

But in the .spec file, it's clear that it will build using the soname "librdkafka1".

So, how should it be? Is this an error? or it is just that librdkakfa is different than librdkafka1