1 Corinthians 14:29

And let the prophets speak by two or three, and let the others discern. But if a revelation be made to another sitting by, let the first keep silence. For ye all can prophesy one by one, that all may learn, and all may be exhorted; and the spirits of the prophets are subject to the prophets.

In a word, these four verses lay down practically the same rules for the prophets as those applying to those having the tongues (of either kind). There were not to be over three on any one occasion; two may not speak at once; and if one prophet was interrupted by another, that was the end of the first prophet's message! This would have made for shorter services, since the probable result was that they could run through the maximum number of three rather quickly under those rules!

The spirits of the prophets are subject to the prophets ... means that any true prophet could control his speaking; there was not any such thing as an irresistible compulsion for any TRUE prophet to speak. Rules like these carry the strong implication that some at Corinth had claimed otherwise.

Putting together all of Paul's regulations, the conclusion persists that there were also false prophets engaging in the free-for-all orgiastic demonstrations going on in Corinth. Certainly, in the case of the tongue speakers: (1) they were all speaking at once, (2) perhaps dozens were participating every Sunday, and (3) such a thing as interpreting what was spoken in tongues had been ignored altogether.