Aug 06 - Subjunctive With Gerunds

For the Word of the Day -"La sesión", the following example is given:

"Después de 10 sesiones con la psicóloga todavía no siento que estoy superando mis problemas emocionales".

I think this is a typical example where the subjunctive should be used after an expression of doubt or denial so we should have here "esté superando". Can anybody explain why not? Gracias de antemano.