Gouramis are like bettas, two males cannot be kept together. Sometimes it is possible with adequate space and a lot of plants to break their line of site, but I doubt 29 gallons is enough space for all of those gouramis. So yes, it is normal behavior, but you really need to think about separating them. I'm not sure if the different types will be ok together, but multiple gouramis of the same species will not, if they are males.
I bought 2 young males together. They were fine in my 29 gallon as adolescents, but as they matured, they begin fighting and I had to separate them.