The two issues in Romans 14

Exactly what is the nature of the two issues that Paul is referring to here in Romans 14?

Eating meat is almost certainly not an issue of vegetarianism or eating meat, but rather of eating meat that had been sacrificed to idols. Paul is saying that since an idol is nothing in and of itself, there is no problem with eating the meats sold in the meat market which may well have been sacrificed to idols.

The problem with this is that the decision of the early church in Acts 15 appears to be at odds with what Paul is saying. The early church at their first council decided that eating meat sacrificed to idols was not acceptable and gave it as a commandment to the new Gentile Christians. Maybe this tension is alright just as it is. It may be nothing more than evidence that Paul got what he wanted on the circumcision issue and was willing to be flexible on the issues that were not as pressing. If that's the right reading, then it weakens the authority of the first council for those who consider church councils to be infallible (typically Eastern Orthodox and Catholic Christians).

The second point revolves around the day that one celebrates. Here the issues seems to be Sabbath vs Sunday worship, although I'd like to hear from our Seventh Day Adventist readers if that is they way that they view this passage. There is much New Testament evidence, as well as the evidence offered from historical continuity that there was a change in day of worship in the early church away from Saturday (to be more precise Friday at sunset to Saturday at sunset). The church seems to have started worship on Sundays in celebration of "The Lord's Day", i. e., the day that Jesus rose from the dead.