a prison worse than death?

According to [Reporters without Borders], 105 journalists were murdered over the year. Iraq, where at least 62 were killed, was the most dangerous place, followed by Mexico (8), Somalia (7), Pakistan (4), Afghanistan (4), Sri Lanka (2) and Eritrea (2). It would be no surprise if these countries ended up with the lowest scores. However, with the exception of Eritrea ranking 169th, this is not the case...
How is it that Eritrea, where only two journalists were murdered, ended up ranked below Iraq (157), Mexico (136), Somalia (159), Pakistan (152), Afghanistan (142) and Sri Lanka (156)? Perhaps because that nation is on Washington’s black list and RSF receives funding from the CIA front National Endowment for Democracy, NED?
Likewise what is the explanation for Cuba ranking 165 when not one journalist has been killed there since 1959? Why is this nation ranked below Iraq, Mexico, Somalia, Pakistan, Afghanistan, Sri Lanka, Brazil (84), China (163), United States (48), Haiti (75), Nepal (137), Paraguay (90), Peru (117), Democratic Republic of the Congo (133), Turkey (101) and Zimbabwe (149), where at least one journalist has been killed? RSF explains that Cuba’s poor ranking is due to journalists being imprisoned. Just supposing the organization is correct on this point –which is actually far from being the case-, wouldn’t killing journalists still be more serious than imprisoning them?