I am having this problem. I made a composition and place all values for size and length. At this point everything is alright. But when I add a new solid, the solid isn't made as the same length of the composition. So I have to drag it all the way down.
It sounds like you've changed a Preference setting. Open the Preferences Dialog Window and then the Import section. Change the Still Footage setting to Length of Composition. As you now know, AE sees a Solid as a Still Image.
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Move the current-time indicator to the time at which you want to set the In point or Out point. To set the In point to the current time, press Alt+[ (Windows) or Option+[ (Mac OS). To set the Out point to the current time, press Alt+] (Windows) or Option+] (Mac OS).
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