Your alternator is failing. There is no other reasonable conclusion.
Everything that you mentioned--from the glowing of both the charging system light and the e-brake light, to the random failure and restoration of power to various accessories--is totally consistent with the alternator dying.
I suggest that you replace it today, as it could be totally dead by tomorrow, and if you wait another day, in addition to getting stranded and needing a tow, you will probably also wind up killing your battery.