Higher hashrate but earning same as before

I recently added a third GPU to my second mining I built. Before I added the GPU my hashrate was roughly 71MH, now it’s at 103MH. Ethermine is reporting that my hashrate has increased to the same rate my software is saying, which is good, but the site is also saying my daily earning amount hasn’t changed. Could this be a glitch or is the new installed GPU not making any difference in my mining?

May need to wait 24 hours so the rate adjusts for consistent increase in your hashrate