The problem with the two situations that you have mentioned is that the Spirit will never provide a word/message to a congregation in tongues it simply does not happen, though of course many Pentecostals and Charismatics are under the mistaken understanding that he does. With the two examples that you provided, it is more than evident that some individuals spoke up trying to pretend that they were speaking under the power of the Spirit. When the Lord wants to speak to an individual or to a congregation he will always do so with prophecy.
I interpret Biblicist's comments to refer to the two differing positions among Pentecostals and charismatics on the issue of prophetic tongues.
One position is that interpreted tongues are prophetic messages from God given to a congregation. This is based on Paul's words in 1 Cor. 14:1-5 and the experience of Pentecostals/charismatics. Paul says that 'The one who prophesies is greater than the one who speaks in tongues, unless someone interprets, so that the church may be built up." Some Pentecostals interpret this to mean that tongues + interpretation = prophecy. I believe this is a biblical view.
Many of the gifts of the Spirit are interrelated as they express the diversity and interdependence of the members of the body. Some theologians have said the gift of (special) faith is the foundational gift for the gift of miracles and healings to take place. The gift of tongues and the gift of interpretation rely on each other in order to function properly. So it is with tongues, interpretation, and prophecy. These three gifts can work together. A person can exercise the gift of prophecy in an unknown language and another person in the congregation interprets it. It's that simple, but profound in that it is expressing how all the gifts are needed in the body, and how one strengthens the others.
However, there is another school in Pentecostal/charismatic thought that believes that speaking in tongues + interpretation is NEVER prophetic utterance. What they believe is that a message in tongues is ALWAYS directed from MAN to GOD, not the other way around. Therefore, these Pentecostals think that when someone speaks out in tongues, he is basically expressing his own heart and thoughts toward God, but sharing them with the assembly so that others can be edified through his utterance. What this school believes is that Pentecostals have misunderstood the gift of tongues confusing utterance from their own spirits with utterance from the Spirit of God.
On another note, I find it funny that some are so insistent on interpreting Paul's instructions in an extremely narrow fashion. However, this narrowness is not extended to other Pauline commands, such as 1 Cor. 14:34-35 (the same chapter which talks about tongues and interpretation) which states:
"the women should keep silent in the churches. For they are not permitted to speak, but should be in submission, as the Law also says. If there is anything they desire to learn, let them ask their husbands at home. For it is shameful for a woman to speak in church."
We allow women to preach and speak in church, yet Paul's statement is quite clear. The reason women are allowed to preach is that we do not understand Scripture in isolation, but within the context of the entire word of God, which we see as validating and approving of women speaking, teaching, and preaching in the church. We should do the same for tongues and interpretation. These two gifts, all the way back to Acts, are closely related to prophecy. On the day of Pentecost, those who were filled with the Spirit began to speak in tongues that could be understood by those around them. How did Peter explain what was happening? He said this was that which was prophesied by Joel---that in the last days God would pour out his Spirit on sons and daughters and they would PROPHESY!