I need to add a few notes here. For starters, the strip tests are the most inaccurate tests you can buy. I would never rely on those results as being the actual water quality.
As was mentioned, you will also need to know ammonia levels, so maybe a trip to your LFS with a water sample for testing is the answer? Ask them to write down exact results and the name brand of test kits they are using. This will help us to help you as soon as possible.
Be forewarned, many LFS's won't take fish while they are sick, so you will want to do the best you can to treat them and get them well before trying to take them back. In the very least, talk to a manager at the LFS, explain that someone sold you the wrong kind of fish for a 10 gallon tank and now the fish are sick and you don't have a large enough tank to accomidate them. Most places will replace them with something suitable and eat the loss if they can't treat the fish themselves succussfully.
However you go about it, 10 gallons won't sustain those fish. I didn't see mentioned about how long this tank has been set up, either. That is important information, and tells us some of what to look for in the water quality test results. Bala's are awesome fish, but they are very prone to stress issues, they're skittish, and very sensitive to water quality and medications. Are there any other fish in the tank with them? I would suggest floating some plants, live or fake, no matter, and increasing the decorations to help avoid stress. If you decide to move them into a larger tank, I can also suggest some safe medication options for you.
It was suggested to put them into a 55 gallon, but be aware that this, also, would be temporary. Balas reach 14 inches full grown, and if properly cared for, can reach that size in the first few yrs. For 1 or 2 of them to go to full grown, you're looking at 125 gallons or more.
Are the fish eating at this point? What kind of foods? How often?
Are there any other symptoms you can list? Do the sores appear to be "open sores"? Are they oozing or pussing?