Aka, a Pyrrhic bargain.. now you put the savings back out, in getting it repaired.

[ from the Pyrrhic victory of 280 BC http://en.wikipedia.org/wiki/Pyrrhic_victory]

Diamond Back name was sold,* spoke problem is likely they built the wheels,
with the low bid spokes. it's Economics, not Design.

* it's now offered through non bike shops. [ like amazon & Ebay]

Schwinn is having 2 lines made one sold thru their long standing shops, the other through Big-Box stores.

rebuild with better name-brand spokes, Sapim , DT, Wheelsmith, etc.

you got a bike in the condition most Bike Shops start with,
then they, take the wheels off tension and true them and see to the adjustments in the whole,
are up to the standards of the Shop.