Timeline and plot holes

Okay so this is my fav show of all time and I’ve rewatched a million times but omg I need to rant about the timeline discontinuities and plot holes. I may be the only one who cares 😅

1. Nationals was in 2009, and the girls were 16, but in 2011 before worlds Payson and Kelly’s mums referred to them as 16 😅 the math ain’t mathing
2. Gengei cho and Tessa grande were 14 so they should have been juniors like Wendy, and therefore not competing against the girls until they turn 16
3. In the first episode they said it’s there last nationals then its continuously referred to yearly. At the training camp in 2012 they are still calling kaylie the national champ when she won in 2009
4. Kelly won worlds in 2010, so why wearnt the girls also at worlds?
5. The China meet was in 2010 (see Payson write it at the end of the episode). Then they are already saying worlds is a few months away. The timeline just doesn’t make sense
6. Did Payson medal at worlds and get the healthy bar money? Did any of them get individual medals at worlds?