Do inhaled steroids for asthma cause disorders like fungus in your lungs?

No, they treat it. The air we breathe always has fungal spores in it, and these don't usually cause any problems. When they do, a fungus ball can form (rare), we can get a fungal pneumonia (mainly in immune suppressed patients), or we can get an allergic reaction to the fungus. The last is commonest, and is treated with inhaled and systemic steroids + antifungals. The fungus itself and immune disorders cause it.
Unlikely. Inhaled steoids can cause thrush, a fungal infection in the mouth and throat area. It would be distinctly unusual for inhaled steroids to cause fungal lung infections - in fact inhaled steroids are used to treatment a from of asthma casued be fungal lung problems.