SLOW and WEIRD when charging

[midnightsrealm]

This is my second day with the Samsung Galaxy S2 Epic 4g on Sprint network, and I'm having a really weird issue when the phone charges.

When it's charging, the phone is extremely slow, and only responds to about 1/10 of my interaction with the screen. Sometimes when I press one thing on the screen, it opens another and does something completely different as if it had a mind of its own. When texting, I may press one letter, and then it thinks I pressed like 5 other letters.

However, when I unplug the phone, it is extremely fast and works perfectly.

I hope that this is clear, as it's somewhat difficult to explain. There is something going on WHILE IT IS CHARGING to make it buggy/laggy/slow/weird. I don't know if it's some sort of power saving setting or what.

Please help! Thanks.