Is there anything sharp in your tank that they could cut themselves on or get caught on??? Rocks, filters, ornaments, tubing, plastic plants???? Have you actually seen them fighting/niping at eachother???
Tell us the answers to these questions and we might be more help:
How many axi's do you have?
How big and old are they?
Are they male or female?
How big is your tank?
How long have you had them?
What "things" do you have in the tank? - ornaments, plants, fliter, airstone etc...
Tell us all that sort of stuff and we might be able to help. As for the laying eggs thing....I'm not sure - maybe the male is ready and the female isn't, or you don't have a female in there afterall, or maybe your axi's are a bit slow and it'll take more than 2 days to lay the eggs???????