Possible Team Builder Rune/Mastery Page Bug

In the process of sorting runes/masteries to join a random group in Team Builder, I referred to a friends mastery page for the champion I wanted to play, as I tend to use higher ranked friends' pages to help me. When I returned to the Team Builder I had not yet finished, my mastery pages were now all titled as my friends pages are. The names of the mastery pages in this picture are not mine, but the names of pages my friend has. I had to exit Team Builder and start over again to fix my mastery pages. Not sure why this happened.