Yes she can lay more eggs without mating again.

As far as the males and color, 2 things come to mind.... are they warm enough? Usually get darker when cooler than they were. Check your temps. And they coul;d be ready to shed, they get dark, look dirty- ish, then shed and WA - Lah light again :0)
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Eve
suncharmers@yahoo.com
eva@suncharmers.com
Suncharmers Colorful Collareds & Lotsa Leopards

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