Red Dragon Randomly Encountered?

[Lightning Hunter]

There's only supposed to be one red dragon guarding the path to a chest on the last floor of the volcano and one blue dragon guarding the tile in the Mirage Tower that teleports to the Sky Castle. Anything else is a glitch.

In that case, I guess I have encountered multiple glitches. I should have recorded it. too late now! I wonder what sort of glitch possibly caused me to randomly encounter two Red Dragons in the volcano, and one blue dragon in the Tower of Mirage? Something else I've noticed is that I keep encountering LOTS of Green Dragons in the temple of chaos. I know you are supposed to encounter them here, but the fact that I found them like 10 times in a row (in groups of 4) might be a glitch. Needless to say, I didn't survive the trip due to their Toxin attack... I don't know what the deal is with my party finding multitudes of dragons this playthrough, but maybe it has to do with the combination (Thief, Monk, White Mage, and Black Mage).