Power only CHARGES battery in one direction but provides power either direction

So I have a MacBook Pro... I think it's 2010ish. I've noticed that suddenly, the way I've always plugged my power in doesn't actually charge the battery. The battery recognized that it's connected to power but says it's connected but not charging. When I turn the plug around, it sees the power then starts charging. It's really annoying since the direction that will charge makes the cord more in my way and more likely to rip the entire laptop off the desk if it somehow gets pulled (not likely, but still). I would understand if it didn't work at all in one direction, due to the explanation I got here http://superuser.com/questions/111705/why-does-my-magsafe-power-connector-only-w ork-one-way-round (first response by redtuna), but since it kinda works both directions, I'm not sure that applies. My computer is completely updated. In fact.... now that I think about it, it might have started when I updated. Any ideas?
Also... In about an hour of ONLY playing music, my battery went from 96% (at which point it stopped charging so I haven't gotten back to 100% in awhile) to 19%. Any ideas on this either? The power was plugged in the whole time!

If it's out of warranty you bet. No fix is cheap on a Mac out of warranty.
More then likely the logic board will need to be replaced as everything is either soldered to or built into the logic board.
Good Luck & Best Wishes.

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Is this problem indicative that the whole system is on the way out? or might i get a few more months out of this thing by just charging the battery while it is open, and while im working? Any idea what this problem might be? It is past even the 3 year extended apple care plan we had, so that is not an option.
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thanks for any help
Battery Information:
Model Information:
Serial Number: DP-ASMB016-371d-4927
Manufacturer: DP
Device name: ASMB016
Pack Lot Code: 0002
PCB Lot Code: 0000
Firmware Version: 102a
Hardware Revision: 0500
Cell Revision: 0102
Charge Information:
Charge remaining (mAh): 4468
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 4771
Health Information:
Cycle count: 307
Condition: Good
Battery Installed: Yes
Amperage (mA): -737
Voltage (mV): 12333
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 25
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 15
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: Yes
--------------------------------------

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