Phil throws a hot dog behind him, but when it goes back to him talking to Keely, the hot dog is still there.
Keely is just becoming friends with Pim because she needs tutoring in algebra. In one of the final scenes, Pim comes up to Phil during lunch and says their dad called, so it's time for them to go home. When you first see Pim her necklace is undone, then when they are getting up to leave Pim's necklace is clasped.
Darcy appears on two different days, but is wearing the same shirt both days.
When Phil and Keely are at Phil's locker and he is loading the sodas into the little "drawer", you can see that when Tanner comes over to talk to Keely, and Phil closes his locker, there is no dividing line, or in other words, the door is in one piece, without the "lock drawer" (where he puts his sodas) deperated from the other part of the locker door.
When Phil and Tia are sitting at the little table outside the house doing their homework, Keely comes running over to the table to tell them about Tanner and when she sits down you can see her knock some purple papers off the table and then the next time they show it, the papers back on the table.
How exactly did Phil get a drawer in his locker? And wouldn't it interfere with the locker below him by taking up space?