Hi here are some answers to your questions.
- I use fiddler to detect and debug API requests.
- At the moment I have one instance of each gadget open. 1x Bitcoin, 1x Litecoin and 1x MyCoin
What data would help you to find the source of this issue?
Can you try this? Clear Fiddler log. Open settings of a single gadget, say MyBitcoins. Apply settings - which should refresh all values in that gadget. How many requests do you get in Fiddler, to which servers? Is that in line with your settings?